73958813 has 4 divisors (see below), whose sum is σ = 74157468. Its totient is φ = 73760160.

The previous prime is 73958761. The next prime is 73958837. The reversal of 73958813 is 31885937.

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: 31885937 = 97 ⋅328721.

It can be written as a sum of positive squares in 2 ways, for example, as 62378404 + 11580409 = 7898^2 + 3403^2 .

It is a cyclic number.

It is not a de Polignac number, because 73958813 - 2⁶ = 73958749 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 (73958873) 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, 98768 + ... + 99513.

It is an arithmetic number, because the mean of its divisors is an integer number (18539367).

Almost surely, 2^73958813 is an apocalyptic number.

It is an amenable number.

73958813 is a deficient number, since it is larger than the sum of its proper divisors (198655).

73958813 is a wasteful number, since it uses less digits than its factorization.

73958813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198654.

The product of its digits is 181440, while the sum is 44.

The square root of 73958813 is about 8599.9309880952. The cubic root of 73958813 is about 419.7557404375.

The spelling of 73958813 in words is "seventy-three million, nine hundred fifty-eight thousand, eight hundred thirteen".