971999998 has 4 divisors (see below), whose sum is σ = 1458000000. Its totient is φ = 485999998.

The previous prime is 971999921. The next prime is 972000017. The reversal of 971999998 is 899999179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899999179 = 701 ⋅1283879.

It is a super-2 number, since 2×971999998² = 1889567992224000008, 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, 242999998 + ... + 243000001.

It is an arithmetic number, because the mean of its divisors is an integer number (364500000).

Almost surely, 2^971999998 is an apocalyptic number.

971999998 is a deficient number, since it is larger than the sum of its proper divisors (486000002).

971999998 is a wasteful number, since it uses less digits than its factorization.

971999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486000001.

The product of its digits is 29760696, while the sum is 70.

The square root of 971999998 is about 31176.9145041648. The cubic root of 971999998 is about 990.5781739890.

The spelling of 971999998 in words is "nine hundred seventy-one million, nine hundred ninety-nine thousand, nine hundred ninety-eight".