72173698 has 8 divisors (see below), whose sum is σ = 108714240. Its totient is φ = 35935620.

The previous prime is 72173683. The next prime is 72173707. The reversal of 72173698 is 89637127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75018 + ... + 75973.

It is an arithmetic number, because the mean of its divisors is an integer number (13589280).

Almost surely, 2^72173698 is an apocalyptic number.

72173698 is a deficient number, since it is larger than the sum of its proper divisors (36540542).

72173698 is a wasteful number, since it uses less digits than its factorization.

72173698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151232.

The product of its digits is 127008, while the sum is 43.

The square root of 72173698 is about 8495.5104614143. The cubic root of 72173698 is about 416.3510389080.

It can be divided in two parts, 7 and 2173698, that multiplied together give a triangular number (15215886 = T₅₅₁₆).

The spelling of 72173698 in words is "seventy-two million, one hundred seventy-three thousand, six hundred ninety-eight".