71919157 has 8 divisors (see below), whose sum is σ = 74282400. Its totient is φ = 69578064.

The previous prime is 71919149. The next prime is 71919167. The reversal of 71919157 is 75191917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71919157 - 2³ = 71919149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71919167) 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, 1194 + ... + 12052.

It is an arithmetic number, because the mean of its divisors is an integer number (9285300).

Almost surely, 2^71919157 is an apocalyptic number.

It is an amenable number.

71919157 is a deficient number, since it is larger than the sum of its proper divisors (2363243).

71919157 is a wasteful number, since it uses less digits than its factorization.

71919157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11075.

The product of its digits is 19845, while the sum is 40.

The square root of 71919157 is about 8480.5163168288. The cubic root of 71919157 is about 415.8610023940.

The spelling of 71919157 in words is "seventy-one million, nine hundred nineteen thousand, one hundred fifty-seven".