97979947 has 6 divisors (see below), whose sum is σ = 106096812. Its totient is φ = 90442872.

The previous prime is 97979909. The next prime is 97979963. The reversal of 97979947 is 74997979.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-97979947 is a prime.

It is a super-3 number, since 3×97979947³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97979047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289713 + ... + 290050.

It is an arithmetic number, because the mean of its divisors is an integer number (17682802).

Almost surely, 2^97979947 is an apocalyptic number.

97979947 is a deficient number, since it is larger than the sum of its proper divisors (8116865).

97979947 is a wasteful number, since it uses less digits than its factorization.

97979947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579789 (or 579776 counting only the distinct ones).

The product of its digits is 9001692, while the sum is 61.

The square root of 97979947 is about 9898.4820553457. The cubic root of 97979947 is about 461.0121804352.

The spelling of 97979947 in words is "ninety-seven million, nine hundred seventy-nine thousand, nine hundred forty-seven".