71869731 has 4 divisors (see below), whose sum is σ = 95826312. Its totient is φ = 47913152.

The previous prime is 71869717. The next prime is 71869757. The reversal of 71869731 is 13796817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13796817 = 3 ⋅4598939.

It is a cyclic number.

It is not a de Polignac number, because 71869731 - 2⁶ = 71869667 is a prime.

It is a super-2 number, since 2×71869731² = 10330516468024722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71869711) 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, 11978286 + ... + 11978291.

It is an arithmetic number, because the mean of its divisors is an integer number (23956578).

Almost surely, 2^71869731 is an apocalyptic number.

71869731 is a deficient number, since it is larger than the sum of its proper divisors (23956581).

71869731 is a wasteful number, since it uses less digits than its factorization.

71869731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23956580.

The product of its digits is 63504, while the sum is 42.

The square root of 71869731 is about 8477.6017245445. The cubic root of 71869731 is about 415.7657145867.

The spelling of 71869731 in words is "seventy-one million, eight hundred sixty-nine thousand, seven hundred thirty-one".