157649 has 2 divisors, whose sum is σ = 157650. Its totient is φ = 157648.

The previous prime is 157639. The next prime is 157667. The reversal of 157649 is 946751.

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., 117649 + 40000 = 343^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 157649 - 2⁸ = 157393 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (157639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78824 + 78825.

It is an arithmetic number, because the mean of its divisors is an integer number (78825).

2¹⁵⁷⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

157649 is a deficient number, since it is larger than the sum of its proper divisors (1).

157649 is an equidigital number, since it uses as much as digits as its factorization.

157649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 157649 is about 397.0503746378. The cubic root of 157649 is about 54.0211394144.

The spelling of 157649 in words is "one hundred fifty-seven thousand, six hundred forty-nine".