76409813 has 4 divisors (see below), whose sum is σ = 76567200. Its totient is φ = 76252428.

The previous prime is 76409807. The next prime is 76409819. The reversal of 76409813 is 31890467.

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 an interprime number because it is at equal distance from previous prime (76409807) and next prime (76409819).

It is a cyclic number.

It is not a de Polignac number, because 76409813 - 2¹⁶ = 76344277 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 (76409819) 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, 77963 + ... + 78936.

It is an arithmetic number, because the mean of its divisors is an integer number (19141800).

Almost surely, 2^76409813 is an apocalyptic number.

It is an amenable number.

76409813 is a deficient number, since it is larger than the sum of its proper divisors (157387).

76409813 is a wasteful number, since it uses less digits than its factorization.

76409813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157386.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 76409813 is about 8741.2706742212. The cubic root of 76409813 is about 424.3423517331.

The spelling of 76409813 in words is "seventy-six million, four hundred nine thousand, eight hundred thirteen".