157913971 has 4 divisors (see below), whose sum is σ = 157939200. Its totient is φ = 157888744.

The previous prime is 157913957. The next prime is 157913981. The reversal of 157913971 is 179319751.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 157913971 - 2⁵ = 157913939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157913941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4665 + ... + 18373.

It is an arithmetic number, because the mean of its divisors is an integer number (39484800).

Almost surely, 2^157913971 is an apocalyptic number.

157913971 is a deficient number, since it is larger than the sum of its proper divisors (25229).

157913971 is a wasteful number, since it uses less digits than its factorization.

157913971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25228.

The product of its digits is 59535, while the sum is 43.

The square root of 157913971 is about 12566.3825741539. The cubic root of 157913971 is about 540.5138809614.

The spelling of 157913971 in words is "one hundred fifty-seven million, nine hundred thirteen thousand, nine hundred seventy-one".