97966531 has 4 divisors (see below), whose sum is σ = 105502432. Its totient is φ = 90430632.

The previous prime is 97966501. The next prime is 97966559. The reversal of 97966531 is 13566979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13566979 = 163 ⋅83233.

It is a cyclic number.

It is not a de Polignac number, because 97966531 - 2¹³ = 97958339 is a prime.

It is a super-2 number, since 2×97966531² = 19194882392347922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97966501) 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, 3767931 + ... + 3767956.

It is an arithmetic number, because the mean of its divisors is an integer number (26375608).

Almost surely, 2^97966531 is an apocalyptic number.

97966531 is the 5715-th hex number.

97966531 is a deficient number, since it is larger than the sum of its proper divisors (7535901).

97966531 is a wasteful number, since it uses less digits than its factorization.

97966531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7535900.

The product of its digits is 306180, while the sum is 46.

The square root of 97966531 is about 9897.8043524814. The cubic root of 97966531 is about 460.9911379603.

The spelling of 97966531 in words is "ninety-seven million, nine hundred sixty-six thousand, five hundred thirty-one".