743072557 has 2 divisors, whose sum is σ = 743072558. Its totient is φ = 743072556.

The previous prime is 743072549. The next prime is 743072579. The reversal of 743072557 is 755270347.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734464201 + 8608356 = 27101^2 + 2934^2 .

It is a cyclic number.

It is not a de Polignac number, because 743072557 - 2³ = 743072549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (743072527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371536278 + 371536279.

It is an arithmetic number, because the mean of its divisors is an integer number (371536279).

Almost surely, 2^743072557 is an apocalyptic number.

It is an amenable number.

743072557 is a deficient number, since it is larger than the sum of its proper divisors (1).

743072557 is an equidigital number, since it uses as much as digits as its factorization.

743072557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 205800, while the sum is 40.

The square root of 743072557 is about 27259.3572374699. The cubic root of 743072557 is about 905.7543061551.

The spelling of 743072557 in words is "seven hundred forty-three million, seventy-two thousand, five hundred fifty-seven".