91944997 has 2 divisors, whose sum is σ = 91944998. Its totient is φ = 91944996.

The previous prime is 91944991. The next prime is 91945003. The reversal of 91944997 is 79944919.

It is a balanced prime because it is at equal distance from previous prime (91944991) and next prime (91945003).

It can be written as a sum of positive squares in only one way, i.e., 78039556 + 13905441 = 8834^2 + 3729^2 .

It is a cyclic number.

It is not a de Polignac number, because 91944997 - 2³ = 91944989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91944991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45972498 + 45972499.

It is an arithmetic number, because the mean of its divisors is an integer number (45972499).

Almost surely, 2^91944997 is an apocalyptic number.

It is an amenable number.

91944997 is a deficient number, since it is larger than the sum of its proper divisors (1).

91944997 is an equidigital number, since it uses as much as digits as its factorization.

91944997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 91944997 is about 9588.7953883687. The cubic root of 91944997 is about 451.3457606844.

The spelling of 91944997 in words is "ninety-one million, nine hundred forty-four thousand, nine hundred ninety-seven".