82137970 has 8 divisors (see below), whose sum is σ = 147848364. Its totient is φ = 32855184.

The previous prime is 82137967. The next prime is 82137973. The reversal of 82137970 is 7973128.

It is a Cunningham number, because it is equal to 9063²+1.

It is an interprime number because it is at equal distance from previous prime (82137967) and next prime (82137973).

It can be written as a sum of positive squares in 2 ways, for example, as 82137969 + 1 = 9063^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×82137970² = 13493292231441800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82137973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4106889 + ... + 4106908.

Almost surely, 2^82137970 is an apocalyptic number.

82137970 is a deficient number, since it is larger than the sum of its proper divisors (65710394).

82137970 is a wasteful number, since it uses less digits than its factorization.

82137970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8213804.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 82137970 is about 9063.0000551694. Note that the first 4 decimals coincide. The cubic root of 82137970 is about 434.6916738794.

The spelling of 82137970 in words is "eighty-two million, one hundred thirty-seven thousand, nine hundred seventy".