91554397 has 8 divisors (see below), whose sum is σ = 99964800. Its totient is φ = 83158560.

The previous prime is 91554349. The next prime is 91554403. The reversal of 91554397 is 79345519.

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 91554397 - 2¹⁹ = 91030109 is a prime.

It is a super-2 number, since 2×91554397² = 16764415220067218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91554347) 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, 12729 + ... + 18577.

It is an arithmetic number, because the mean of its divisors is an integer number (12495600).

Almost surely, 2^91554397 is an apocalyptic number.

It is an amenable number.

91554397 is a deficient number, since it is larger than the sum of its proper divisors (8410403).

91554397 is a wasteful number, since it uses less digits than its factorization.

91554397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7283.

The product of its digits is 170100, while the sum is 43.

The square root of 91554397 is about 9568.4061891205. The cubic root of 91554397 is about 450.7057190049.

The spelling of 91554397 in words is "ninety-one million, five hundred fifty-four thousand, three hundred ninety-seven".