1253343997 has 2 divisors, whose sum is σ = 1253343998. Its totient is φ = 1253343996.

The previous prime is 1253343977. The next prime is 1253344033. The reversal of 1253343997 is 7993433521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1148260996 + 105083001 = 33886^2 + 10251^2 .

It is an emirp because it is prime and its reverse (7993433521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1253343997 - 2²³ = 1244955389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253343977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626671998 + 626671999.

It is an arithmetic number, because the mean of its divisors is an integer number (626671999).

Almost surely, 2^1253343997 is an apocalyptic number.

It is an amenable number.

1253343997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253343997 is an equidigital number, since it uses as much as digits as its factorization.

1253343997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 46.

The square root of 1253343997 is about 35402.5987322965. The cubic root of 1253343997 is about 1078.1770794496.

The spelling of 1253343997 in words is "one billion, two hundred fifty-three million, three hundred forty-three thousand, nine hundred ninety-seven".