744947263421 has 2 divisors, whose sum is σ = 744947263422. Its totient is φ = 744947263420.

The previous prime is 744947263393. The next prime is 744947263441. The reversal of 744947263421 is 124362749447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470801822500 + 274145440921 = 686150^2 + 523589^2 .

It is an emirp because it is prime and its reverse (124362749447) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744947263421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744947263441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372473631710 + 372473631711.

It is an arithmetic number, because the mean of its divisors is an integer number (372473631711).

Almost surely, 2^744947263421 is an apocalyptic number.

It is an amenable number.

744947263421 is a deficient number, since it is larger than the sum of its proper divisors (1).

744947263421 is an equidigital number, since it uses as much as digits as its factorization.

744947263421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 53.

The spelling of 744947263421 in words is "seven hundred forty-four billion, nine hundred forty-seven million, two hundred sixty-three thousand, four hundred twenty-one".