73976421 has 4 divisors (see below), whose sum is σ = 98635232. Its totient is φ = 49317612.

The previous prime is 73976407. The next prime is 73976429. The reversal of 73976421 is 12467937.

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 not a de Polignac number, because 73976421 - 2⁷ = 73976293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73976421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73976429) 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, 12329401 + ... + 12329406.

It is an arithmetic number, because the mean of its divisors is an integer number (24658808).

Almost surely, 2^73976421 is an apocalyptic number.

It is an amenable number.

73976421 is a deficient number, since it is larger than the sum of its proper divisors (24658811).

73976421 is a wasteful number, since it uses less digits than its factorization.

73976421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24658810.

The product of its digits is 63504, while the sum is 39.

The square root of 73976421 is about 8600.9546563158. The cubic root of 73976421 is about 419.7890493938.

The spelling of 73976421 in words is "seventy-three million, nine hundred seventy-six thousand, four hundred twenty-one".