76199921 has 4 divisors (see below), whose sum is σ = 87085632. Its totient is φ = 65314212.

The previous prime is 76199917. The next prime is 76199927. The reversal of 76199921 is 12999167.

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: 12999167 = 1613 ⋅8059.

It is a cyclic number.

It is not a de Polignac number, because 76199921 - 2² = 76199917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76199927) 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, 5442845 + ... + 5442858.

It is an arithmetic number, because the mean of its divisors is an integer number (21771408).

Almost surely, 2^76199921 is an apocalyptic number.

It is an amenable number.

76199921 is a deficient number, since it is larger than the sum of its proper divisors (10885711).

76199921 is a wasteful number, since it uses less digits than its factorization.

76199921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10885710.

The product of its digits is 61236, while the sum is 44.

The square root of 76199921 is about 8729.2566121062. The cubic root of 76199921 is about 423.9534499299.

The spelling of 76199921 in words is "seventy-six million, one hundred ninety-nine thousand, nine hundred twenty-one".