307772945 has 16 divisors (see below), whose sum is σ = 373721040. Its totient is φ = 243302400.

The previous prime is 307772939. The next prime is 307772953. The reversal of 307772945 is 549277703.

It can be written as a sum of positive squares in 8 ways, for example, as 2362369 + 305410576 = 1537^2 + 17476^2 .

It is not a de Polignac number, because 307772945 - 2¹⁰ = 307771921 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 307772896 and 307772905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348905 + ... + 349785.

It is an arithmetic number, because the mean of its divisors is an integer number (23357565).

Almost surely, 2^307772945 is an apocalyptic number.

It is an amenable number.

307772945 is a deficient number, since it is larger than the sum of its proper divisors (65948095).

307772945 is a wasteful number, since it uses less digits than its factorization.

307772945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 307772945 is about 17543.4587524809. The cubic root of 307772945 is about 675.1653513524.

The spelling of 307772945 in words is "three hundred seven million, seven hundred seventy-two thousand, nine hundred forty-five".