73400643 has 12 divisors (see below), whose sum is σ = 106181920. Its totient is φ = 48860496.

The previous prime is 73400641. The next prime is 73400669. The reversal of 73400643 is 34600437.

It is not a de Polignac number, because 73400643 - 2¹ = 73400641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73400641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630 + ... + 12132.

Almost surely, 2^73400643 is an apocalyptic number.

73400643 is a deficient number, since it is larger than the sum of its proper divisors (32781277).

73400643 is a wasteful number, since it uses less digits than its factorization.

73400643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12218 (or 12215 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 73400643 is about 8567.4175222175. The cubic root of 73400643 is about 418.6971018648.

The spelling of 73400643 in words is "seventy-three million, four hundred thousand, six hundred forty-three".