307961693 has 16 divisors (see below), whose sum is σ = 342980400. Its totient is φ = 274669056.

The previous prime is 307961683. The next prime is 307961699. The reversal of 307961693 is 396169703.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8602489 + 299359204 = 2933^2 + 17302^2 .

It is not a de Polignac number, because 307961693 - 2⁴ = 307961677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307961699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69521 + ... + 73817.

It is an arithmetic number, because the mean of its divisors is an integer number (21436275).

Almost surely, 2^307961693 is an apocalyptic number.

It is an amenable number.

307961693 is a deficient number, since it is larger than the sum of its proper divisors (35018707).

307961693 is a wasteful number, since it uses less digits than its factorization.

307961693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 307961693 is about 17548.8373688971. The cubic root of 307961693 is about 675.3033427621.

The spelling of 307961693 in words is "three hundred seven million, nine hundred sixty-one thousand, six hundred ninety-three".