264540197 has 2 divisors, whose sum is σ = 264540198. Its totient is φ = 264540196.

The previous prime is 264540167. The next prime is 264540203. The reversal of 264540197 is 791045462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242393761 + 22146436 = 15569^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 264540197 - 2¹² = 264536101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 264540197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264540137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132270098 + 132270099.

It is an arithmetic number, because the mean of its divisors is an integer number (132270099).

Almost surely, 2^264540197 is an apocalyptic number.

It is an amenable number.

264540197 is a deficient number, since it is larger than the sum of its proper divisors (1).

264540197 is an equidigital number, since it uses as much as digits as its factorization.

264540197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 264540197 is about 16264.6917277888. The cubic root of 264540197 is about 641.9441185109.

The spelling of 264540197 in words is "two hundred sixty-four million, five hundred forty thousand, one hundred ninety-seven".