91997354 has 16 divisors (see below), whose sum is σ = 146230080. Its totient is φ = 43286400.

The previous prime is 91997303. The next prime is 91997359. The reversal of 91997354 is 45379919.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91997299 and 91997308.

It is not an unprimeable number, because it can be changed into a prime (91997359) 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, 2279 + ... + 13754.

It is an arithmetic number, because the mean of its divisors is an integer number (9139380).

Almost surely, 2^91997354 is an apocalyptic number.

91997354 is a deficient number, since it is larger than the sum of its proper divisors (54232726).

91997354 is a wasteful number, since it uses less digits than its factorization.

91997354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16205.

The product of its digits is 306180, while the sum is 47.

The square root of 91997354 is about 9591.5251133488. The cubic root of 91997354 is about 451.4314156111.

The spelling of 91997354 in words is "ninety-one million, nine hundred ninety-seven thousand, three hundred fifty-four".