73423639 has 2 divisors, whose sum is σ = 73423640. Its totient is φ = 73423638.

The previous prime is 73423631. The next prime is 73423703. The reversal of 73423639 is 93632437.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73423639 - 2³ = 73423631 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 73423598 and 73423607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73423631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36711819 + 36711820.

It is an arithmetic number, because the mean of its divisors is an integer number (36711820).

Almost surely, 2^73423639 is an apocalyptic number.

73423639 is a deficient number, since it is larger than the sum of its proper divisors (1).

73423639 is an equidigital number, since it uses as much as digits as its factorization.

73423639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 37.

The square root of 73423639 is about 8568.7594784776. The cubic root of 73423639 is about 418.7408224320.

The spelling of 73423639 in words is "seventy-three million, four hundred twenty-three thousand, six hundred thirty-nine".