253495961 has 4 divisors (see below), whose sum is σ = 256005924. Its totient is φ = 250986000.

The previous prime is 253495943. The next prime is 253495981. The reversal of 253495961 is 169594352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 217267600 + 36228361 = 14740^2 + 6019^2 .

It is a cyclic number.

It is not a de Polignac number, because 253495961 - 2¹⁸ = 253233817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253495981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254830 + ... + 1255031.

It is an arithmetic number, because the mean of its divisors is an integer number (64001481).

Almost surely, 2^253495961 is an apocalyptic number.

It is an amenable number.

253495961 is a deficient number, since it is larger than the sum of its proper divisors (2509963).

253495961 is a wasteful number, since it uses less digits than its factorization.

253495961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509962.

The product of its digits is 291600, while the sum is 44.

The square root of 253495961 is about 15921.5564879819. The cubic root of 253495961 is about 632.8833660425.

The spelling of 253495961 in words is "two hundred fifty-three million, four hundred ninety-five thousand, nine hundred sixty-one".