157980393 has 6 divisors (see below), whose sum is σ = 228193914. Its totient is φ = 105320256.

The previous prime is 157980391. The next prime is 157980397. The reversal of 157980393 is 393089751.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 150994944 + 6985449 = 12288^2 + 2643^2 .

It is not a de Polignac number, because 157980393 - 2¹ = 157980391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157980391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8776680 + ... + 8776697.

It is an arithmetic number, because the mean of its divisors is an integer number (38032319).

Almost surely, 2^157980393 is an apocalyptic number.

It is an amenable number.

157980393 is a deficient number, since it is larger than the sum of its proper divisors (70213521).

157980393 is a wasteful number, since it uses less digits than its factorization.

157980393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17553383 (or 17553380 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 157980393 is about 12569.0251411953. The cubic root of 157980393 is about 540.5896542452.

The spelling of 157980393 in words is "one hundred fifty-seven million, nine hundred eighty thousand, three hundred ninety-three".