72294691 has 4 divisors (see below), whose sum is σ = 82622512. Its totient is φ = 61966872.

The previous prime is 72294683. The next prime is 72294713. The reversal of 72294691 is 19649227.

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 72294691 - 2³ = 72294683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72294631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5163900 + ... + 5163913.

It is an arithmetic number, because the mean of its divisors is an integer number (20655628).

Almost surely, 2^72294691 is an apocalyptic number.

72294691 is a deficient number, since it is larger than the sum of its proper divisors (10327821).

72294691 is a wasteful number, since it uses less digits than its factorization.

72294691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327820.

The product of its digits is 54432, while the sum is 40.

The square root of 72294691 is about 8502.6284759479. The cubic root of 72294691 is about 416.5835679259.

The spelling of 72294691 in words is "seventy-two million, two hundred ninety-four thousand, six hundred ninety-one".