72899997 has 8 divisors (see below), whose sum is σ = 100551840. Its totient is φ = 46924080.

The previous prime is 72899993. The next prime is 72899999. The reversal of 72899997 is 79999827.

It is a happy number.

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

It is not a de Polignac number, because 72899997 - 2² = 72899993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72899997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72899993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418879 + ... + 419052.

It is an arithmetic number, because the mean of its divisors is an integer number (12568980).

Almost surely, 2^72899997 is an apocalyptic number.

It is an amenable number.

72899997 is a deficient number, since it is larger than the sum of its proper divisors (27651843).

72899997 is a wasteful number, since it uses less digits than its factorization.

72899997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837963.

The product of its digits is 5143824, while the sum is 60.

The square root of 72899997 is about 8538.1495067725. The cubic root of 72899997 is about 417.7429892948.

The spelling of 72899997 in words is "seventy-two million, eight hundred ninety-nine thousand, nine hundred ninety-seven".