97870091 has 8 divisors (see below), whose sum is σ = 107713584. Its totient is φ = 88184320.

The previous prime is 97870081. The next prime is 97870093. The reversal of 97870091 is 19007879.

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

It is a cyclic number.

It is not a de Polignac number, because 97870091 - 2¹⁸ = 97607947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97870093) 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 7 ways as a sum of consecutive naturals, for example, 38126 + ... + 40611.

It is an arithmetic number, because the mean of its divisors is an integer number (13464198).

Almost surely, 2^97870091 is an apocalyptic number.

97870091 is a deficient number, since it is larger than the sum of its proper divisors (9843493).

97870091 is a wasteful number, since it uses less digits than its factorization.

97870091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78861.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 97870091 is about 9892.9313653740. The cubic root of 97870091 is about 460.8398189970.

The spelling of 97870091 in words is "ninety-seven million, eight hundred seventy thousand, ninety-one".