72534706 has 4 divisors (see below), whose sum is σ = 108802062. Its totient is φ = 36267352.

The previous prime is 72534703. The next prime is 72534727. The reversal of 72534706 is 60743527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60743527 = 13 ⋅4672579.

It can be written as a sum of positive squares in only one way, i.e., 49829481 + 22705225 = 7059^2 + 4765^2 .

It is a super-2 number, since 2×72534706² = 10522567149012872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72534703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18133675 + ... + 18133678.

Almost surely, 2^72534706 is an apocalyptic number.

72534706 is a deficient number, since it is larger than the sum of its proper divisors (36267356).

72534706 is a wasteful number, since it uses less digits than its factorization.

72534706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36267355.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 72534706 is about 8516.7309456152. The cubic root of 72534706 is about 417.0440713523.

The spelling of 72534706 in words is "seventy-two million, five hundred thirty-four thousand, seven hundred six".