72455707 has 4 divisors (see below), whose sum is σ = 73008936. Its totient is φ = 71902480.

The previous prime is 72455699. The next prime is 72455723. The reversal of 72455707 is 70755427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70755427 = 929 ⋅76163.

It is a cyclic number.

It is not a de Polignac number, because 72455707 - 2³ = 72455699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72455737) 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, 276418 + ... + 276679.

It is an arithmetic number, because the mean of its divisors is an integer number (18252234).

Almost surely, 2^72455707 is an apocalyptic number.

72455707 is a deficient number, since it is larger than the sum of its proper divisors (553229).

72455707 is a wasteful number, since it uses less digits than its factorization.

72455707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553228.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 72455707 is about 8512.0918110650. The cubic root of 72455707 is about 416.8926126718.

The spelling of 72455707 in words is "seventy-two million, four hundred fifty-five thousand, seven hundred seven".