91291405901 has 8 divisors (see below), whose sum is σ = 91707495264. Its totient is φ = 90876088080.

The previous prime is 91291405889. The next prime is 91291405939. The reversal of 91291405901 is 10950419219.

It is a happy number.

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 91291405901 - 2²² = 91287211597 is a prime.

It is a super-2 number, since 2×91291405901² (a number of 23 digits) 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 (91291405991) 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, 44966 + ... + 429656.

It is an arithmetic number, because the mean of its divisors is an integer number (11463436908).

Almost surely, 2^91291405901 is an apocalyptic number.

It is an amenable number.

91291405901 is a deficient number, since it is larger than the sum of its proper divisors (416089363).

91291405901 is a wasteful number, since it uses less digits than its factorization.

91291405901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385771.

The product of its (nonzero) digits is 29160, while the sum is 41.

The spelling of 91291405901 in words is "ninety-one billion, two hundred ninety-one million, four hundred five thousand, nine hundred one".