73807421 has 12 divisors (see below), whose sum is σ = 80329620. Its totient is φ = 67760640.

The previous prime is 73807417. The next prime is 73807451. The reversal of 73807421 is 12470837.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 19321 + 73788100 = 139^2 + 8590^2 .

It is not a de Polignac number, because 73807421 - 2² = 73807417 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73807451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8735 + ... + 14963.

It is an arithmetic number, because the mean of its divisors is an integer number (6694135).

Almost surely, 2^73807421 is an apocalyptic number.

It is an amenable number.

73807421 is a deficient number, since it is larger than the sum of its proper divisors (6522199).

73807421 is a wasteful number, since it uses less digits than its factorization.

73807421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6304 (or 6287 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 73807421 is about 8591.1245480438. The cubic root of 73807421 is about 419.4691346540.

The spelling of 73807421 in words is "seventy-three million, eight hundred seven thousand, four hundred twenty-one".