71864797 has 4 divisors (see below), whose sum is σ = 76092156. Its totient is φ = 67637440.

The previous prime is 71864747. The next prime is 71864801. The reversal of 71864797 is 79746817.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31236921 + 40627876 = 5589^2 + 6374^2 .

It is a cyclic number.

It is not a de Polignac number, because 71864797 - 2¹⁵ = 71832029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71864797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71864717) 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, 2113654 + ... + 2113687.

It is an arithmetic number, because the mean of its divisors is an integer number (19023039).

Almost surely, 2^71864797 is an apocalyptic number.

It is an amenable number.

71864797 is a deficient number, since it is larger than the sum of its proper divisors (4227359).

71864797 is a wasteful number, since it uses less digits than its factorization.

71864797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227358.

The product of its digits is 592704, while the sum is 49.

The square root of 71864797 is about 8477.3107174386. The cubic root of 71864797 is about 415.7561999879.

The spelling of 71864797 in words is "seventy-one million, eight hundred sixty-four thousand, seven hundred ninety-seven".