307040691 has 4 divisors (see below), whose sum is σ = 409387592. Its totient is φ = 204693792.

The previous prime is 307040687. The next prime is 307040693. The reversal of 307040691 is 196040703.

It is a happy number.

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

It is not a de Polignac number, because 307040691 - 2² = 307040687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (307040693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51173446 + ... + 51173451.

It is an arithmetic number, because the mean of its divisors is an integer number (102346898).

Almost surely, 2^307040691 is an apocalyptic number.

307040691 is a deficient number, since it is larger than the sum of its proper divisors (102346901).

307040691 is a wasteful number, since it uses less digits than its factorization.

307040691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102346900.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 307040691 is about 17522.5766084786. The cubic root of 307040691 is about 674.6294745609.

The spelling of 307040691 in words is "three hundred seven million, forty thousand, six hundred ninety-one".