71964399 has 16 divisors (see below), whose sum is σ = 106898400. Its totient is φ = 42758016.

The previous prime is 71964359. The next prime is 71964437. The reversal of 71964399 is 99346917.

It is not a de Polignac number, because 71964399 - 2⁷ = 71964271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71964329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30684 + ... + 32945.

It is an arithmetic number, because the mean of its divisors is an integer number (6681150).

Almost surely, 2^71964399 is an apocalyptic number.

71964399 is a deficient number, since it is larger than the sum of its proper divisors (34934001).

71964399 is a wasteful number, since it uses less digits than its factorization.

71964399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63674.

The product of its digits is 367416, while the sum is 48.

The square root of 71964399 is about 8483.1833058116. The cubic root of 71964399 is about 415.9481856540.

The spelling of 71964399 in words is "seventy-one million, nine hundred sixty-four thousand, three hundred ninety-nine".