9979477 has 4 divisors (see below), whose sum is σ = 10011276. Its totient is φ = 9947680.

The previous prime is 9979471. The next prime is 9979511. The reversal of 9979477 is 7749799.

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

It can be written as a sum of positive squares in 2 ways, for example, as 579121 + 9400356 = 761^2 + 3066^2 .

It is a cyclic number.

It is not a de Polignac number, because 9979477 - 2³ = 9979469 is a prime.

It is a super-2 number, since 2×9979477² = 199179922387058, which contains 22 as substring.

It is a Duffinian number.

9979477 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979471) 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, 15424 + ... + 16057.

It is an arithmetic number, because the mean of its divisors is an integer number (2502819).

Almost surely, 2^9979477 is an apocalyptic number.

It is an amenable number.

9979477 is a deficient number, since it is larger than the sum of its proper divisors (31799).

9979477 is a wasteful number, since it uses less digits than its factorization.

9979477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31798.

The product of its digits is 1000188, while the sum is 52.

The square root of 9979477 is about 3159.0310223231. The cubic root of 9979477 is about 215.2959831849.

The spelling of 9979477 in words is "nine million, nine hundred seventy-nine thousand, four hundred seventy-seven".