157196997 has 8 divisors (see below), whose sum is σ = 232884480. Its totient is φ = 104797980.

The previous prime is 157196983. The next prime is 157197031. The reversal of 157196997 is 799691751.

It is a happy number.

157196997 is a `hidden beast` number, since 1 + 571 + 9 + 69 + 9 + 7 = 666.

157196997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157196997 - 2⁷ = 157196869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157196947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2911029 + ... + 2911082.

It is an arithmetic number, because the mean of its divisors is an integer number (29110560).

Almost surely, 2^157196997 is an apocalyptic number.

It is an amenable number.

157196997 is a deficient number, since it is larger than the sum of its proper divisors (75687483).

157196997 is an equidigital number, since it uses as much as digits as its factorization.

157196997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822120 (or 5822114 counting only the distinct ones).

The product of its digits is 1071630, while the sum is 54.

The square root of 157196997 is about 12537.8226578621. The cubic root of 157196997 is about 539.6946112753.

The spelling of 157196997 in words is "one hundred fifty-seven million, one hundred ninety-six thousand, nine hundred ninety-seven".