97131145 has 8 divisors (see below), whose sum is σ = 116765640. Its totient is φ = 77566080.

The previous prime is 97131143. The next prime is 97131191. The reversal of 97131145 is 54113179.

It can be written as a sum of positive squares in 4 ways, for example, as 1951609 + 95179536 = 1397^2 + 9756^2 .

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

It is not a de Polignac number, because 97131145 - 2¹ = 97131143 is a prime.

It is a super-2 number, since 2×97131145² = 18868918658022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97131143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14226 + ... + 19915.

It is an arithmetic number, because the mean of its divisors is an integer number (14595705).

Almost surely, 2^97131145 is an apocalyptic number.

It is an amenable number.

97131145 is a deficient number, since it is larger than the sum of its proper divisors (19634495).

97131145 is a wasteful number, since it uses less digits than its factorization.

97131145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34715.

The product of its digits is 3780, while the sum is 31.

The square root of 97131145 is about 9855.5134315773. The cubic root of 97131145 is about 459.6770654032.

The spelling of 97131145 in words is "ninety-seven million, one hundred thirty-one thousand, one hundred forty-five".