157311889 has 4 divisors (see below), whose sum is σ = 179785024. Its totient is φ = 134838756.

The previous prime is 157311883. The next prime is 157311907. The reversal of 157311889 is 988113751.

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, and also an emirpimes, since its reverse is a distinct semiprime: 988113751 = 79 ⋅12507769.

It is a cyclic number.

It is not a de Polignac number, because 157311889 - 2¹³ = 157303697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157311883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11236557 + ... + 11236570.

It is an arithmetic number, because the mean of its divisors is an integer number (44946256).

Almost surely, 2^157311889 is an apocalyptic number.

It is an amenable number.

157311889 is a deficient number, since it is larger than the sum of its proper divisors (22473135).

157311889 is an equidigital number, since it uses as much as digits as its factorization.

157311889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22473134.

The product of its digits is 60480, while the sum is 43.

The square root of 157311889 is about 12542.4036372619. The cubic root of 157311889 is about 539.8260630929.

The spelling of 157311889 in words is "one hundred fifty-seven million, three hundred eleven thousand, eight hundred eighty-nine".