157561373 has 2 divisors, whose sum is σ = 157561374. Its totient is φ = 157561372.

The previous prime is 157561351. The next prime is 157561387. The reversal of 157561373 is 373165751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101566084 + 55995289 = 10078^2 + 7483^2 .

It is a cyclic number.

It is not a de Polignac number, because 157561373 - 2⁶ = 157561309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157561333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78780686 + 78780687.

It is an arithmetic number, because the mean of its divisors is an integer number (78780687).

Almost surely, 2^157561373 is an apocalyptic number.

It is an amenable number.

157561373 is a deficient number, since it is larger than the sum of its proper divisors (1).

157561373 is an equidigital number, since it uses as much as digits as its factorization.

157561373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 38.

The square root of 157561373 is about 12552.3453187044. The cubic root of 157561373 is about 540.1112859347. Note that the first 3 decimals are identical.

The spelling of 157561373 in words is "one hundred fifty-seven million, five hundred sixty-one thousand, three hundred seventy-three".