72974109 has 16 divisors (see below), whose sum is σ = 105235200. Its totient is φ = 44713536.

The previous prime is 72974089. The next prime is 72974113. The reversal of 72974109 is 90147927.

It is not a de Polignac number, because 72974109 - 2⁸ = 72973853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72974129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5407 + ... + 13235.

It is an arithmetic number, because the mean of its divisors is an integer number (6577200).

Almost surely, 2^72974109 is an apocalyptic number.

It is an amenable number.

72974109 is a deficient number, since it is larger than the sum of its proper divisors (32261091).

72974109 is a wasteful number, since it uses less digits than its factorization.

72974109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8084.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 72974109 is about 8542.4884547771. The cubic root of 72974109 is about 417.8845040827.

The spelling of 72974109 in words is "seventy-two million, nine hundred seventy-four thousand, one hundred nine".