157801903 has 6 divisors (see below), whose sum is σ = 183565536. Its totient is φ = 135258732.

The previous prime is 157801879. The next prime is 157801909. The reversal of 157801903 is 309108751.

It is a happy number.

It is not a de Polignac number, because 157801903 - 2¹⁷ = 157670831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157801909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1610175 + ... + 1610272.

It is an arithmetic number, because the mean of its divisors is an integer number (30594256).

Almost surely, 2^157801903 is an apocalyptic number.

157801903 is a deficient number, since it is larger than the sum of its proper divisors (25763633).

157801903 is an equidigital number, since it uses as much as digits as its factorization.

157801903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220461 (or 3220454 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 157801903 is about 12561.9227429562. The cubic root of 157801903 is about 540.3859871799.

The spelling of 157801903 in words is "one hundred fifty-seven million, eight hundred one thousand, nine hundred three".