72998247 has 16 divisors (see below), whose sum is σ = 117090560. Its totient is φ = 39517632.

The previous prime is 72998243. The next prime is 72998257. The reversal of 72998247 is 74289927.

It is not a de Polignac number, because 72998247 - 2² = 72998243 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72998196 and 72998205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72998243) 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, 91078 + ... + 91875.

It is an arithmetic number, because the mean of its divisors is an integer number (7318160).

Almost surely, 2^72998247 is an apocalyptic number.

72998247 is a deficient number, since it is larger than the sum of its proper divisors (44092313).

72998247 is a wasteful number, since it uses less digits than its factorization.

72998247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182982.

The product of its digits is 508032, while the sum is 48.

The square root of 72998247 is about 8543.9011581361. The cubic root of 72998247 is about 417.9305742316.

The spelling of 72998247 in words is "seventy-two million, nine hundred ninety-eight thousand, two hundred forty-seven".