307140397 has 4 divisors (see below), whose sum is σ = 310010976. Its totient is φ = 304269820.

The previous prime is 307140359. The next prime is 307140403. The reversal of 307140397 is 793041703.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307140397 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 (307240397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435129 + ... + 1435342.

It is an arithmetic number, because the mean of its divisors is an integer number (77502744).

Almost surely, 2^307140397 is an apocalyptic number.

It is an amenable number.

307140397 is a deficient number, since it is larger than the sum of its proper divisors (2870579).

307140397 is a wasteful number, since it uses less digits than its factorization.

307140397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870578.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 307140397 is about 17525.4214499966. The cubic root of 307140397 is about 674.7024912963.

The spelling of 307140397 in words is "three hundred seven million, one hundred forty thousand, three hundred ninety-seven".