1272497623 has 2 divisors, whose sum is σ = 1272497624. Its totient is φ = 1272497622.

The previous prime is 1272497561. The next prime is 1272497657. The reversal of 1272497623 is 3267942721.

It is a strong prime.

It is an emirp because it is prime and its reverse (3267942721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1272497623 - 2¹³ = 1272489431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1272497623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272497683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636248811 + 636248812.

It is an arithmetic number, because the mean of its divisors is an integer number (636248812).

Almost surely, 2^1272497623 is an apocalyptic number.

1272497623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272497623 is an equidigital number, since it uses as much as digits as its factorization.

1272497623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 1272497623 is about 35672.0846461207. The cubic root of 1272497623 is about 1083.6415777270.

The spelling of 1272497623 in words is "one billion, two hundred seventy-two million, four hundred ninety-seven thousand, six hundred twenty-three".