76103921 has 4 divisors (see below), whose sum is σ = 76142052. Its totient is φ = 76065792.

The previous prime is 76103899. The next prime is 76103933. The reversal of 76103921 is 12930167.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12930167 = 79 ⋅163673.

It can be written as a sum of positive squares in 2 ways, for example, as 12503296 + 63600625 = 3536^2 + 7975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76103921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76103971) 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, 15896 + ... + 20121.

It is an arithmetic number, because the mean of its divisors is an integer number (19035513).

Almost surely, 2^76103921 is an apocalyptic number.

It is an amenable number.

76103921 is a deficient number, since it is larger than the sum of its proper divisors (38131).

76103921 is a wasteful number, since it uses less digits than its factorization.

76103921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38130.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 76103921 is about 8723.7561290994. The cubic root of 76103921 is about 423.7753367319.

The spelling of 76103921 in words is "seventy-six million, one hundred three thousand, nine hundred twenty-one".