1253379269 has 2 divisors, whose sum is σ = 1253379270. Its totient is φ = 1253379268.

The previous prime is 1253379241. The next prime is 1253379271. The reversal of 1253379269 is 9629733521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 937890625 + 315488644 = 30625^2 + 17762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253379269 is a prime.

It is a super-2 number, since 2×1253379269² = 3141919183917948722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1253379271, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253379229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626689634 + 626689635.

It is an arithmetic number, because the mean of its divisors is an integer number (626689635).

Almost surely, 2^1253379269 is an apocalyptic number.

It is an amenable number.

1253379269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253379269 is an equidigital number, since it uses as much as digits as its factorization.

1253379269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 47.

The square root of 1253379269 is about 35403.0968843123. The cubic root of 1253379269 is about 1078.1871934873.

The spelling of 1253379269 in words is "one billion, two hundred fifty-three million, three hundred seventy-nine thousand, two hundred sixty-nine".