147897531 has 6 divisors (see below), whose sum is σ = 213629780. Its totient is φ = 98598348.

The previous prime is 147897523. The next prime is 147897551. The reversal of 147897531 is 135798741.

It is not a de Polignac number, because 147897531 - 2³ = 147897523 is a prime.

It is a super-2 number, since 2×147897531² = 43747359351791922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147897551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8216521 + ... + 8216538.

Almost surely, 2^147897531 is an apocalyptic number.

147897531 is a deficient number, since it is larger than the sum of its proper divisors (65732249).

147897531 is a wasteful number, since it uses less digits than its factorization.

147897531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16433065 (or 16433062 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 147897531 is about 12161.3128814286. The cubic root of 147897531 is about 528.8351431388.

The spelling of 147897531 in words is "one hundred forty-seven million, eight hundred ninety-seven thousand, five hundred thirty-one".