91405053 has 12 divisors (see below), whose sum is σ = 132123420. Its totient is φ = 60893376.

The previous prime is 91405037. The next prime is 91405099. The reversal of 91405053 is 35050419.

It can be written as a sum of positive squares in 2 ways, for example, as 31775769 + 59629284 = 5637^2 + 7722^2 .

It is not a de Polignac number, because 91405053 - 2⁴ = 91405037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91405003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14563 + ... + 19871.

It is an arithmetic number, because the mean of its divisors is an integer number (11010285).

Almost surely, 2^91405053 is an apocalyptic number.

It is an amenable number.

91405053 is a deficient number, since it is larger than the sum of its proper divisors (40718367).

91405053 is a wasteful number, since it uses less digits than its factorization.

91405053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7228 (or 7225 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 91405053 is about 9560.5989875112. The cubic root of 91405053 is about 450.4605211435.

The spelling of 91405053 in words is "ninety-one million, four hundred five thousand, fifty-three".