971979750 has 160 divisors (see below), whose sum is σ = 3106838592. Its totient is φ = 222134400.

The previous prime is 971979733. The next prime is 971979763. The reversal of 971979750 is 57979179.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 138322 + ... + 145178.

Almost surely, 2^971979750 is an apocalyptic number.

971979750 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 971979750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553419296).

971979750 is an abundant number, since it is smaller than the sum of its proper divisors (2134858842).

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

971979750 is a wasteful number, since it uses less digits than its factorization.

971979750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6893 (or 6874 counting only the distinct ones).

The product of its (nonzero) digits is 1250235, while the sum is 54.

The square root of 971979750 is about 31176.5897750219. The cubic root of 971979750 is about 990.5712956055.

The spelling of 971979750 in words is "nine hundred seventy-one million, nine hundred seventy-nine thousand, seven hundred fifty".