75890813 has 4 divisors (see below), whose sum is σ = 75910560. Its totient is φ = 75871068.

The previous prime is 75890747. The next prime is 75890827. The reversal of 75890813 is 31809857.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31809857 = 19 ⋅1674203.

It is a cyclic number.

It is not a de Polignac number, because 75890813 - 2²² = 71696509 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 (75890863) 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, 2033 + ... + 12486.

It is an arithmetic number, because the mean of its divisors is an integer number (18977640).

Almost surely, 2^75890813 is an apocalyptic number.

It is an amenable number.

75890813 is a deficient number, since it is larger than the sum of its proper divisors (19747).

75890813 is a wasteful number, since it uses less digits than its factorization.

75890813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19746.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 75890813 is about 8711.5333323130. The cubic root of 75890813 is about 423.3794117010.

The spelling of 75890813 in words is "seventy-five million, eight hundred ninety thousand, eight hundred thirteen".