72179698 has 4 divisors (see below), whose sum is σ = 108269550. Its totient is φ = 36089848.

The previous prime is 72179669. The next prime is 72179707. The reversal of 72179698 is 89697127.

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: 89697127 = 13 ⋅6899779.

It can be written as a sum of positive squares in only one way, i.e., 67782289 + 4397409 = 8233^2 + 2097^2 .

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18044923 + ... + 18044926.

Almost surely, 2^72179698 is an apocalyptic number.

72179698 is a deficient number, since it is larger than the sum of its proper divisors (36089852).

72179698 is a wasteful number, since it uses less digits than its factorization.

72179698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36089851.

The product of its digits is 381024, while the sum is 49.

The square root of 72179698 is about 8495.8635817673. The cubic root of 72179698 is about 416.3625760611.

The spelling of 72179698 in words is "seventy-two million, one hundred seventy-nine thousand, six hundred ninety-eight".