72699394 has 4 divisors (see below), whose sum is σ = 109049094. Its totient is φ = 36349696.

The previous prime is 72699391. The next prime is 72699427. The reversal of 72699394 is 49399627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63920025 + 8779369 = 7995^2 + 2963^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72699391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18174847 + ... + 18174850.

Almost surely, 2^72699394 is an apocalyptic number.

72699394 is a deficient number, since it is larger than the sum of its proper divisors (36349700).

72699394 is a wasteful number, since it uses less digits than its factorization.

72699394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36349699.

The product of its digits is 734832, while the sum is 49.

The square root of 72699394 is about 8526.3939622797. The cubic root of 72699394 is about 417.3594617034.

The spelling of 72699394 in words is "seventy-two million, six hundred ninety-nine thousand, three hundred ninety-four".