197490253 has 2 divisors, whose sum is σ = 197490254. Its totient is φ = 197490252.

The previous prime is 197490247. The next prime is 197490281. The reversal of 197490253 is 352094791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106440489 + 91049764 = 10317^2 + 9542^2 .

It is a cyclic number.

It is not a de Polignac number, because 197490253 - 2⁹ = 197489741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197490353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98745126 + 98745127.

It is an arithmetic number, because the mean of its divisors is an integer number (98745127).

Almost surely, 2^197490253 is an apocalyptic number.

It is an amenable number.

197490253 is a deficient number, since it is larger than the sum of its proper divisors (1).

197490253 is an equidigital number, since it uses as much as digits as its factorization.

197490253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 197490253 is about 14053.1225355791. The cubic root of 197490253 is about 582.3470619629.

The spelling of 197490253 in words is "one hundred ninety-seven million, four hundred ninety thousand, two hundred fifty-three".