91970501 has 6 divisors (see below), whose sum is σ = 106986150. Its totient is φ = 78831816.

The previous prime is 91970497. The next prime is 91970509. The reversal of 91970501 is 10507919.

It can be written as a sum of positive squares in only one way, i.e., 91968100 + 2401 = 9590^2 + 49^2 .

It is not a de Polignac number, because 91970501 - 2² = 91970497 is a prime.

It is a super-3 number, since 3×91970501³ (a number of 25 digits) contains 333 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 (91970509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 938426 + ... + 938523.

It is an arithmetic number, because the mean of its divisors is an integer number (17831025).

Almost surely, 2^91970501 is an apocalyptic number.

It is an amenable number.

91970501 is a deficient number, since it is larger than the sum of its proper divisors (15015649).

91970501 is a wasteful number, since it uses less digits than its factorization.

91970501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876963 (or 1876956 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 91970501 is about 9590.1251816647. The cubic root of 91970501 is about 451.3874887410.

The spelling of 91970501 in words is "ninety-one million, nine hundred seventy thousand, five hundred one".