73672639 has 4 divisors (see below), whose sum is σ = 73749024. Its totient is φ = 73596256.

The previous prime is 73672601. The next prime is 73672663. The reversal of 73672639 is 93627637.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73672639 - 2¹¹ = 73670591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73672595 and 73672604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73672699) 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, 36727 + ... + 38680.

It is an arithmetic number, because the mean of its divisors is an integer number (18437256).

Almost surely, 2^73672639 is an apocalyptic number.

73672639 is a deficient number, since it is larger than the sum of its proper divisors (76385).

73672639 is an equidigital number, since it uses as much as digits as its factorization.

73672639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76384.

The product of its digits is 285768, while the sum is 43.

The square root of 73672639 is about 8583.2767053148. The cubic root of 73672639 is about 419.2136439112.

The spelling of 73672639 in words is "seventy-three million, six hundred seventy-two thousand, six hundred thirty-nine".