251434493 has 2 divisors, whose sum is σ = 251434494. Its totient is φ = 251434492.

The previous prime is 251434441. The next prime is 251434529. The reversal of 251434493 is 394434152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164814244 + 86620249 = 12838^2 + 9307^2 .

It is a cyclic number.

It is not a de Polignac number, because 251434493 - 2⁸ = 251434237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251434423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125717246 + 125717247.

It is an arithmetic number, because the mean of its divisors is an integer number (125717247).

Almost surely, 2^251434493 is an apocalyptic number.

It is an amenable number.

251434493 is a deficient number, since it is larger than the sum of its proper divisors (1).

251434493 is an equidigital number, since it uses as much as digits as its factorization.

251434493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 35.

The square root of 251434493 is about 15856.6860661363. The cubic root of 251434493 is about 631.1631263254.

The spelling of 251434493 in words is "two hundred fifty-one million, four hundred thirty-four thousand, four hundred ninety-three".