253399997 has 2 divisors, whose sum is σ = 253399998. Its totient is φ = 253399996.

The previous prime is 253399969. The next prime is 253400003. The reversal of 253399997 is 799993352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147598201 + 105801796 = 12149^2 + 10286^2 .

It is a cyclic number.

It is not a de Polignac number, because 253399997 - 2¹⁸ = 253137853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253399907) 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 as a sum of consecutive naturals, namely, 126699998 + 126699999.

It is an arithmetic number, because the mean of its divisors is an integer number (126699999).

Almost surely, 2^253399997 is an apocalyptic number.

It is an amenable number.

253399997 is a deficient number, since it is larger than the sum of its proper divisors (1).

253399997 is an equidigital number, since it uses as much as digits as its factorization.

253399997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4133430, while the sum is 56.

The square root of 253399997 is about 15918.5425526334. The cubic root of 253399997 is about 632.8034940469.

The spelling of 253399997 in words is "two hundred fifty-three million, three hundred ninety-nine thousand, nine hundred ninety-seven".