72706533 has 4 divisors (see below), whose sum is σ = 96942048. Its totient is φ = 48471020.

The previous prime is 72706531. The next prime is 72706541. The reversal of 72706533 is 33560727.

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 72706533 - 2¹ = 72706531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72706494 and 72706503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72706531) 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, 12117753 + ... + 12117758.

It is an arithmetic number, because the mean of its divisors is an integer number (24235512).

Almost surely, 2^72706533 is an apocalyptic number.

It is an amenable number.

72706533 is a deficient number, since it is larger than the sum of its proper divisors (24235515).

72706533 is a wasteful number, since it uses less digits than its factorization.

72706533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24235514.

The product of its (nonzero) digits is 26460, while the sum is 33.

The square root of 72706533 is about 8526.8125932261. The cubic root of 72706533 is about 417.3731226686.

The spelling of 72706533 in words is "seventy-two million, seven hundred six thousand, five hundred thirty-three".