157872061 has 2 divisors, whose sum is σ = 157872062. Its totient is φ = 157872060.

The previous prime is 157872037. The next prime is 157872067. The reversal of 157872061 is 160278751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157628025 + 244036 = 12555^2 + 494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157872061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157872061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157872067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78936030 + 78936031.

It is an arithmetic number, because the mean of its divisors is an integer number (78936031).

Almost surely, 2^157872061 is an apocalyptic number.

It is an amenable number.

157872061 is a deficient number, since it is larger than the sum of its proper divisors (1).

157872061 is an equidigital number, since it uses as much as digits as its factorization.

157872061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 157872061 is about 12564.7149191695. The cubic root of 157872061 is about 540.4660596890.

The spelling of 157872061 in words is "one hundred fifty-seven million, eight hundred seventy-two thousand, sixty-one".