253579999 has 2 divisors, whose sum is σ = 253580000. Its totient is φ = 253579998.

The previous prime is 253579943. The next prime is 253580003. The reversal of 253579999 is 999975352.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253579999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253579919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126789999 + 126790000.

It is an arithmetic number, because the mean of its divisors is an integer number (126790000).

Almost surely, 2^253579999 is an apocalyptic number.

253579999 is a deficient number, since it is larger than the sum of its proper divisors (1).

253579999 is an equidigital number, since it uses as much as digits as its factorization.

253579999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6889050, while the sum is 58.

The square root of 253579999 is about 15924.1953956864. The cubic root of 253579999 is about 632.9532953303.

The spelling of 253579999 in words is "two hundred fifty-three million, five hundred seventy-nine thousand, nine hundred ninety-nine".