971403975 has 48 divisors (see below), whose sum is σ = 1878451200. Its totient is φ = 490808160.

The previous prime is 971403959. The next prime is 971403977. The reversal of 971403975 is 579304179.

It is not a de Polignac number, because 971403975 - 2⁴ = 971403959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 971403975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971403977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25047 + ... + 50696.

It is an arithmetic number, because the mean of its divisors is an integer number (39134400).

Almost surely, 2^971403975 is an apocalyptic number.

971403975 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

971403975 is a deficient number, since it is larger than the sum of its proper divisors (907047225).

971403975 is a wasteful number, since it uses less digits than its factorization.

971403975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75781 (or 75770 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 971403975 is about 31167.3543150522. The cubic root of 971403975 is about 990.3756609248.

The spelling of 971403975 in words is "nine hundred seventy-one million, four hundred three thousand, nine hundred seventy-five".