157440307 has 2 divisors, whose sum is σ = 157440308. Its totient is φ = 157440306.

The previous prime is 157440277. The next prime is 157440319. The reversal of 157440307 is 703044751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157440307 is a prime.

It is not a weakly prime, because it can be changed into another prime (157440347) 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 as a sum of consecutive naturals, namely, 78720153 + 78720154.

It is an arithmetic number, because the mean of its divisors is an integer number (78720154).

Almost surely, 2^157440307 is an apocalyptic number.

157440307 is a deficient number, since it is larger than the sum of its proper divisors (1).

157440307 is an equidigital number, since it uses as much as digits as its factorization.

157440307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 157440307 is about 12547.5219465837. The cubic root of 157440307 is about 539.9729147366.

The spelling of 157440307 in words is "one hundred fifty-seven million, four hundred forty thousand, three hundred seven".