743987137 has 2 divisors, whose sum is σ = 743987138. Its totient is φ = 743987136.

The previous prime is 743987093. The next prime is 743987173. The reversal of 743987137 is 731789347.

Together with next prime (743987173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741799696 + 2187441 = 27236^2 + 1479^2 .

It is a cyclic number.

It is not a de Polignac number, because 743987137 - 2²³ = 735598529 is a prime.

It is not a weakly prime, because it can be changed into another prime (743988137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371993568 + 371993569.

It is an arithmetic number, because the mean of its divisors is an integer number (371993569).

Almost surely, 2^743987137 is an apocalyptic number.

It is an amenable number.

743987137 is a deficient number, since it is larger than the sum of its proper divisors (1).

743987137 is an equidigital number, since it uses as much as digits as its factorization.

743987137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 49.

The square root of 743987137 is about 27276.1276027225. The cubic root of 743987137 is about 906.1257571603.

The spelling of 743987137 in words is "seven hundred forty-three million, nine hundred eighty-seven thousand, one hundred thirty-seven".