71147990 has 16 divisors (see below), whose sum is σ = 129822048. Its totient is φ = 28069056.

The previous prime is 71147987. The next prime is 71148001. The reversal of 71147990 is 9974117.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48002 + ... + 49461.

It is an arithmetic number, because the mean of its divisors is an integer number (8113878).

Almost surely, 2^71147990 is an apocalyptic number.

71147990 is a deficient number, since it is larger than the sum of its proper divisors (58674058).

71147990 is a wasteful number, since it uses less digits than its factorization.

71147990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97543.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 71147990 is about 8434.9267928062. The cubic root of 71147990 is about 414.3692746347.

The spelling of 71147990 in words is "seventy-one million, one hundred forty-seven thousand, nine hundred ninety".