72454747 has 4 divisors (see below), whose sum is σ = 72483400. Its totient is φ = 72426096.

The previous prime is 72454721. The next prime is 72454813. The reversal of 72454747 is 74745427.

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 72454747 - 2²³ = 64066139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72454717) 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, 10122 + ... + 15727.

It is an arithmetic number, because the mean of its divisors is an integer number (18120850).

Almost surely, 2^72454747 is an apocalyptic number.

72454747 is a deficient number, since it is larger than the sum of its proper divisors (28653).

72454747 is a wasteful number, since it uses less digits than its factorization.

72454747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28652.

The product of its digits is 219520, while the sum is 40.

The square root of 72454747 is about 8512.0354205090. The cubic root of 72454747 is about 416.8907714611.

The spelling of 72454747 in words is "seventy-two million, four hundred fifty-four thousand, seven hundred forty-seven".