97891235 has 16 divisors (see below), whose sum is σ = 126735840. Its totient is φ = 72157440.

The previous prime is 97891223. The next prime is 97891237. The reversal of 97891235 is 53219879.

It is a Cunningham number, because it is equal to 9894²-1.

It is not a de Polignac number, because 97891235 - 2¹⁰ = 97890211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97891237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48476 + ... + 50454.

It is an arithmetic number, because the mean of its divisors is an integer number (7920990).

Almost surely, 2^97891235 is an apocalyptic number.

97891235 is a deficient number, since it is larger than the sum of its proper divisors (28844605).

97891235 is a wasteful number, since it uses less digits than its factorization.

97891235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758.

The product of its digits is 136080, while the sum is 44.

The square root of 97891235 is about 9893.9999494643. Note that the first 4 decimals coincide. The cubic root of 97891235 is about 460.8730034473.

The spelling of 97891235 in words is "ninety-seven million, eight hundred ninety-one thousand, two hundred thirty-five".