97986251 has 4 divisors (see below), whose sum is σ = 106894104. Its totient is φ = 89078400.

The previous prime is 97986179. The next prime is 97986263. The reversal of 97986251 is 15268979.

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 97986251 - 2¹⁰ = 97985227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97986196 and 97986205.

It is not an unprimeable number, because it can be changed into a prime (97986271) 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, 4453910 + ... + 4453931.

It is an arithmetic number, because the mean of its divisors is an integer number (26723526).

Almost surely, 2^97986251 is an apocalyptic number.

97986251 is a deficient number, since it is larger than the sum of its proper divisors (8907853).

97986251 is a wasteful number, since it uses less digits than its factorization.

97986251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8907852.

The product of its digits is 272160, while the sum is 47.

The square root of 97986251 is about 9898.8004828868. The cubic root of 97986251 is about 461.0220673510.

The spelling of 97986251 in words is "ninety-seven million, nine hundred eighty-six thousand, two hundred fifty-one".