157590649 has 4 divisors (see below), whose sum is σ = 157616464. Its totient is φ = 157564836.

The previous prime is 157590647. The next prime is 157590661. The reversal of 157590649 is 946095751.

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 not a de Polignac number, because 157590649 - 2¹ = 157590647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157590599 and 157590608.

It is not an unprimeable number, because it can be changed into a prime (157590647) 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 in 3 ways as a sum of consecutive naturals, for example, 1954 + ... + 17860.

It is an arithmetic number, because the mean of its divisors is an integer number (39404116).

Almost surely, 2^157590649 is an apocalyptic number.

It is an amenable number.

157590649 is a deficient number, since it is larger than the sum of its proper divisors (25815).

157590649 is an equidigital number, since it uses as much as digits as its factorization.

157590649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25814.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 157590649 is about 12553.5114211124. The cubic root of 157590649 is about 540.1447360087.

The spelling of 157590649 in words is "one hundred fifty-seven million, five hundred ninety thousand, six hundred forty-nine".