250005391 has 2 divisors, whose sum is σ = 250005392. Its totient is φ = 250005390.

The previous prime is 250005373. The next prime is 250005449. The reversal of 250005391 is 193500052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 250005391 - 2²³ = 241616783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250005191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125002695 + 125002696.

It is an arithmetic number, because the mean of its divisors is an integer number (125002696).

Almost surely, 2^250005391 is an apocalyptic number.

250005391 is a deficient number, since it is larger than the sum of its proper divisors (1).

250005391 is an equidigital number, since it uses as much as digits as its factorization.

250005391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 250005391 is about 15811.5587783115. The cubic root of 250005391 is about 629.9650530711.

The spelling of 250005391 in words is "two hundred fifty million, five thousand, three hundred ninety-one".