253461491 has 4 divisors (see below), whose sum is σ = 253514352. Its totient is φ = 253408632.

The previous prime is 253461443. The next prime is 253461497. The reversal of 253461491 is 194164352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253461491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253461497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18431 + ... + 29096.

It is an arithmetic number, because the mean of its divisors is an integer number (63378588).

Almost surely, 2^253461491 is an apocalyptic number.

253461491 is a deficient number, since it is larger than the sum of its proper divisors (52861).

253461491 is an equidigital number, since it uses as much as digits as its factorization.

253461491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52860.

The product of its digits is 25920, while the sum is 35.

The square root of 253461491 is about 15920.4739565127. The cubic root of 253461491 is about 632.8546785657.

The spelling of 253461491 in words is "two hundred fifty-three million, four hundred sixty-one thousand, four hundred ninety-one".