1772900005 has 4 divisors (see below), whose sum is σ = 2127480012. Its totient is φ = 1418320000.

The previous prime is 1772899993. The next prime is 1772900057. The reversal of 1772900005 is 5000092771.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5000092771 = 57559 ⋅86869.

It can be written as a sum of positive squares in 2 ways, for example, as 802079041 + 970820964 = 28321^2 + 31158^2 .

It is not a de Polignac number, because 1772900005 - 2²¹ = 1770802853 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1772900005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177289996 + ... + 177290005.

It is an arithmetic number, because the mean of its divisors is an integer number (531870003).

Almost surely, 2^1772900005 is an apocalyptic number.

It is an amenable number.

1772900005 is a deficient number, since it is larger than the sum of its proper divisors (354580007).

1772900005 is an equidigital number, since it uses as much as digits as its factorization.

1772900005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354580006.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 1772900005 is about 42105.8191346517. The cubic root of 1772900005 is about 1210.3047760369.

Adding to 1772900005 its reverse (5000092771), we get a palindrome (6772992776).

The spelling of 1772900005 in words is "one billion, seven hundred seventy-two million, nine hundred thousand, five".