72401073 has 4 divisors (see below), whose sum is σ = 96534768. Its totient is φ = 48267380.

The previous prime is 72401059. The next prime is 72401093. The reversal of 72401073 is 37010427.

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 a cyclic number.

It is not a de Polignac number, because 72401073 - 2⁴ = 72401057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72401003) 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, 12066843 + ... + 12066848.

It is an arithmetic number, because the mean of its divisors is an integer number (24133692).

Almost surely, 2^72401073 is an apocalyptic number.

It is an amenable number.

72401073 is a deficient number, since it is larger than the sum of its proper divisors (24133695).

72401073 is a wasteful number, since it uses less digits than its factorization.

72401073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24133694.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 72401073 is about 8508.8820064683. The cubic root of 72401073 is about 416.7878027169.

The spelling of 72401073 in words is "seventy-two million, four hundred one thousand, seventy-three".