971861942 has 4 divisors (see below), whose sum is σ = 1457792916. Its totient is φ = 485930970.

The previous prime is 971861939. The next prime is 971861953. The reversal of 971861942 is 249168179.

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

It is a super-2 number, since 2×971861942² = 1889031268616022728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242965484 + ... + 242965487.

It is an arithmetic number, because the mean of its divisors is an integer number (364448229).

Almost surely, 2^971861942 is an apocalyptic number.

971861942 is a deficient number, since it is larger than the sum of its proper divisors (485930974).

971861942 is a wasteful number, since it uses less digits than its factorization.

971861942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485930973.

The product of its digits is 217728, while the sum is 47.

The square root of 971861942 is about 31174.7003514067. The cubic root of 971861942 is about 990.5312735309.

The spelling of 971861942 in words is "nine hundred seventy-one million, eight hundred sixty-one thousand, nine hundred forty-two".