71900399 has 4 divisors (see below), whose sum is σ = 72002520. Its totient is φ = 71798280.

The previous prime is 71900393. The next prime is 71900417. The reversal of 71900399 is 99300917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99300917 = 241 ⋅412037.

It is a cyclic number.

It is not a de Polignac number, because 71900399 - 2¹⁶ = 71834863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71900393) 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, 49997 + ... + 51414.

It is an arithmetic number, because the mean of its divisors is an integer number (18000630).

Almost surely, 2^71900399 is an apocalyptic number.

71900399 is a deficient number, since it is larger than the sum of its proper divisors (102121).

71900399 is a wasteful number, since it uses less digits than its factorization.

71900399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102120.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 71900399 is about 8479.4102978922. The cubic root of 71900399 is about 415.8248442071.

The spelling of 71900399 in words is "seventy-one million, nine hundred thousand, three hundred ninety-nine".