157649903 has 2 divisors, whose sum is σ = 157649904. Its totient is φ = 157649902.

The previous prime is 157649881. The next prime is 157649923. The reversal of 157649903 is 309946751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157649903 - 2⁸ = 157649647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157649923) 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 as a sum of consecutive naturals, namely, 78824951 + 78824952.

It is an arithmetic number, because the mean of its divisors is an integer number (78824952).

Almost surely, 2^157649903 is an apocalyptic number.

157649903 is a deficient number, since it is larger than the sum of its proper divisors (1).

157649903 is an equidigital number, since it uses as much as digits as its factorization.

157649903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 157649903 is about 12555.8712561096. The cubic root of 157649903 is about 540.2124255699.

The spelling of 157649903 in words is "one hundred fifty-seven million, six hundred forty-nine thousand, nine hundred three".