91949491 has 8 divisors (see below), whose sum is σ = 93141504. Its totient is φ = 90763200.

The previous prime is 91949471. The next prime is 91949513. The reversal of 91949491 is 19494919.

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 91949491 - 2¹³ = 91941299 is a prime.

It is a super-3 number, since 3×91949491³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91949411) 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, 37495 + ... + 39871.

It is an arithmetic number, because the mean of its divisors is an integer number (11642688).

Almost surely, 2^91949491 is an apocalyptic number.

91949491 is a deficient number, since it is larger than the sum of its proper divisors (1192013).

91949491 is a wasteful number, since it uses less digits than its factorization.

91949491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861.

The product of its digits is 104976, while the sum is 46.

The square root of 91949491 is about 9589.0297215099. The cubic root of 91949491 is about 451.3531140474.

The spelling of 91949491 in words is "ninety-one million, nine hundred forty-nine thousand, four hundred ninety-one".