979728247 has 4 divisors (see below), whose sum is σ = 1011332416. Its totient is φ = 948124080.

The previous prime is 979728223. The next prime is 979728283. The reversal of 979728247 is 742827979.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 979728247 - 2⁷ = 979728119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979728047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15802038 + ... + 15802099.

It is an arithmetic number, because the mean of its divisors is an integer number (252833104).

Almost surely, 2^979728247 is an apocalyptic number.

979728247 is a deficient number, since it is larger than the sum of its proper divisors (31604169).

979728247 is a wasteful number, since it uses less digits than its factorization.

979728247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31604168.

The product of its digits is 3556224, while the sum is 55.

The square root of 979728247 is about 31300.6109684779. The cubic root of 979728247 is about 993.1965672726.

The spelling of 979728247 in words is "nine hundred seventy-nine million, seven hundred twenty-eight thousand, two hundred forty-seven".