1247723423 has 2 divisors, whose sum is σ = 1247723424. Its totient is φ = 1247723422.

The previous prime is 1247723401. The next prime is 1247723437. The reversal of 1247723423 is 3243277421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1247723423 - 2²⁴ = 1230946207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247723443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623861711 + 623861712.

It is an arithmetic number, because the mean of its divisors is an integer number (623861712).

Almost surely, 2^1247723423 is an apocalyptic number.

1247723423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247723423 is an equidigital number, since it uses as much as digits as its factorization.

1247723423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 35.

The square root of 1247723423 is about 35323.1287260911. The cubic root of 1247723423 is about 1076.5629827383.

The spelling of 1247723423 in words is "one billion, two hundred forty-seven million, seven hundred twenty-three thousand, four hundred twenty-three".