9977958 has 16 divisors (see below), whose sum is σ = 22173360. Its totient is φ = 3325968.

The previous prime is 9977951. The next prime is 9977971. The reversal of 9977958 is 8597799.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 184777 = 9977958 / (9 + 9 + 7 + 7 + 9 + 5 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977951) 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, 92335 + ... + 92442.

It is an arithmetic number, because the mean of its divisors is an integer number (1385835).

Almost surely, 2^9977958 is an apocalyptic number.

9977958 is an abundant number, since it is smaller than the sum of its proper divisors (12195402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9977958 is a wasteful number, since it uses less digits than its factorization.

9977958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184788 (or 184782 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 54.

The square root of 9977958 is about 3158.7905913498. The cubic root of 9977958 is about 215.2850590589.

The spelling of 9977958 in words is "nine million, nine hundred seventy-seven thousand, nine hundred fifty-eight".