253908461 has 4 divisors (see below), whose sum is σ = 256526172. Its totient is φ = 251290752.

The previous prime is 253908443. The next prime is 253908491. The reversal of 253908461 is 164809352.

It is a happy number.

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 178756900 + 75151561 = 13370^2 + 8669^2 .

It is a cyclic number.

It is not a de Polignac number, because 253908461 - 2¹⁸ = 253646317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253908491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308710 + ... + 1308903.

It is an arithmetic number, because the mean of its divisors is an integer number (64131543).

Almost surely, 2^253908461 is an apocalyptic number.

It is an amenable number.

253908461 is a deficient number, since it is larger than the sum of its proper divisors (2617711).

253908461 is an equidigital number, since it uses as much as digits as its factorization.

253908461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617710.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 253908461 is about 15934.5053578704. The cubic root of 253908461 is about 633.2264654093.

The spelling of 253908461 in words is "two hundred fifty-three million, nine hundred eight thousand, four hundred sixty-one".