157573649 has 2 divisors, whose sum is σ = 157573650. Its totient is φ = 157573648.

The previous prime is 157573627. The next prime is 157573673. The reversal of 157573649 is 946375751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145636624 + 11937025 = 12068^2 + 3455^2 .

It is a cyclic number.

It is not a de Polignac number, because 157573649 - 2⁸ = 157573393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157573049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78786824 + 78786825.

It is an arithmetic number, because the mean of its divisors is an integer number (78786825).

Almost surely, 2^157573649 is an apocalyptic number.

It is an amenable number.

157573649 is a deficient number, since it is larger than the sum of its proper divisors (1).

157573649 is an equidigital number, since it uses as much as digits as its factorization.

157573649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 47.

The square root of 157573649 is about 12552.8343014636. The cubic root of 157573649 is about 540.1253127100.

The spelling of 157573649 in words is "one hundred fifty-seven million, five hundred seventy-three thousand, six hundred forty-nine".