1995372769 has 8 divisors (see below), whose sum is σ = 2184091112. Its totient is φ = 1811687040.

The previous prime is 1995372749. The next prime is 1995372781. The reversal of 1995372769 is 9672735991.

It can be written as a sum of positive squares in 4 ways, for example, as 115283169 + 1880089600 = 10737^2 + 43360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1995372769 - 2⁷ = 1995372641 is a prime.

It is a super-2 number, since 2×1995372769² = 7963024974533454722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995372749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257324 + ... + 1258909.

It is an arithmetic number, because the mean of its divisors is an integer number (273011389).

Almost surely, 2^1995372769 is an apocalyptic number.

It is an amenable number.

1995372769 is a deficient number, since it is larger than the sum of its proper divisors (188718343).

1995372769 is a wasteful number, since it uses less digits than its factorization.

1995372769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516307.

The product of its digits is 6429780, while the sum is 58.

The square root of 1995372769 is about 44669.5955768574. The cubic root of 1995372769 is about 1258.9486419596.

The spelling of 1995372769 in words is "one billion, nine hundred ninety-five million, three hundred seventy-two thousand, seven hundred sixty-nine".