1870972045 has 4 divisors (see below), whose sum is σ = 2245166460. Its totient is φ = 1496777632.

The previous prime is 1870972039. The next prime is 1870972067. The reversal of 1870972045 is 5402790781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 457061641 + 1413910404 = 21379^2 + 37602^2 .

It is a cyclic number.

It is not a de Polignac number, because 1870972045 - 2²¹ = 1868874893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1870971992 and 1870972010.

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, 187097200 + ... + 187097209.

It is an arithmetic number, because the mean of its divisors is an integer number (561291615).

Almost surely, 2^1870972045 is an apocalyptic number.

It is an amenable number.

1870972045 is a deficient number, since it is larger than the sum of its proper divisors (374194415).

1870972045 is an equidigital number, since it uses as much as digits as its factorization.

1870972045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374194414.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 1870972045 is about 43254.7343651536. The cubic root of 1870972045 is about 1232.2224004403. Note that the first 3 decimals are identical.

The spelling of 1870972045 in words is "one billion, eight hundred seventy million, nine hundred seventy-two thousand, forty-five".