71900381 has 4 divisors (see below), whose sum is σ = 82171872. Its totient is φ = 61628892.

The previous prime is 71900371. The next prime is 71900393. The reversal of 71900381 is 18300917.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71900381 - 2⁶ = 71900317 is a prime.

It is a super-2 number, since 2×71900381² = 10339329575890322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71900371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5135735 + ... + 5135748.

It is an arithmetic number, because the mean of its divisors is an integer number (20542968).

Almost surely, 2^71900381 is an apocalyptic number.

It is an amenable number.

71900381 is a deficient number, since it is larger than the sum of its proper divisors (10271491).

71900381 is a wasteful number, since it uses less digits than its factorization.

71900381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271490.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 71900381 is about 8479.4092364976. The cubic root of 71900381 is about 415.8248095070.

The spelling of 71900381 in words is "seventy-one million, nine hundred thousand, three hundred eighty-one".