253140649 has 2 divisors, whose sum is σ = 253140650. Its totient is φ = 253140648.

The previous prime is 253140647. The next prime is 253140689. The reversal of 253140649 is 946041352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240467049 + 12673600 = 15507^2 + 3560^2 .

It is a cyclic number.

It is not a de Polignac number, because 253140649 - 2¹ = 253140647 is a prime.

It is a super-2 number, since 2×253140649² = 128160376352282402, which contains 22 as substring.

Together with 253140647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (253140647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126570324 + 126570325.

It is an arithmetic number, because the mean of its divisors is an integer number (126570325).

Almost surely, 2^253140649 is an apocalyptic number.

It is an amenable number.

253140649 is a deficient number, since it is larger than the sum of its proper divisors (1).

253140649 is an equidigital number, since it uses as much as digits as its factorization.

253140649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 253140649 is about 15910.3943697194. The cubic root of 253140649 is about 632.5875346364.

The spelling of 253140649 in words is "two hundred fifty-three million, one hundred forty thousand, six hundred forty-nine".