97129531 has 4 divisors (see below), whose sum is σ = 97149712. Its totient is φ = 97109352.

The previous prime is 97129523. The next prime is 97129537. The reversal of 97129531 is 13592179.

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

It is a cyclic number.

It is not a de Polignac number, because 97129531 - 2³ = 97129523 is a prime.

It is a super-2 number, since 2×97129531² = 18868291584559922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97129537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1801 + ... + 14053.

It is an arithmetic number, because the mean of its divisors is an integer number (24287428).

Almost surely, 2^97129531 is an apocalyptic number.

97129531 is a deficient number, since it is larger than the sum of its proper divisors (20181).

97129531 is a wasteful number, since it uses less digits than its factorization.

97129531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20180.

The product of its digits is 17010, while the sum is 37.

The square root of 97129531 is about 9855.4315481363. The cubic root of 97129531 is about 459.6745192824.

The spelling of 97129531 in words is "ninety-seven million, one hundred twenty-nine thousand, five hundred thirty-one".