64091197 has 2 divisors, whose sum is σ = 64091198. Its totient is φ = 64091196.

The previous prime is 64091177. The next prime is 64091219. The reversal of 64091197 is 79119046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55264356 + 8826841 = 7434^2 + 2971^2 .

It is a cyclic number.

It is not a de Polignac number, because 64091197 - 2¹¹ = 64089149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64091107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32045598 + 32045599.

It is an arithmetic number, because the mean of its divisors is an integer number (32045599).

Almost surely, 2^64091197 is an apocalyptic number.

It is an amenable number.

64091197 is a deficient number, since it is larger than the sum of its proper divisors (1).

64091197 is an equidigital number, since it uses as much as digits as its factorization.

64091197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 64091197 is about 8005.6977834540. The cubic root of 64091197 is about 400.1899035773.

The spelling of 64091197 in words is "sixty-four million, ninety-one thousand, one hundred ninety-seven".