71399612 has 6 divisors (see below), whose sum is σ = 124949328. Its totient is φ = 35699804.

The previous prime is 71399597. The next prime is 71399623. The reversal of 71399612 is 21699317.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8924948 + ... + 8924955.

It is an arithmetic number, because the mean of its divisors is an integer number (20824888).

Almost surely, 2^71399612 is an apocalyptic number.

It is an amenable number.

71399612 is a deficient number, since it is larger than the sum of its proper divisors (53549716).

71399612 is a wasteful number, since it uses less digits than its factorization.

71399612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17849907 (or 17849905 counting only the distinct ones).

The product of its digits is 20412, while the sum is 38.

The square root of 71399612 is about 8449.8291106980. The cubic root of 71399612 is about 414.8571860650.

The spelling of 71399612 in words is "seventy-one million, three hundred ninety-nine thousand, six hundred twelve".