742639137 has 8 divisors (see below), whose sum is σ = 993350304. Its totient is φ = 493510368.

The previous prime is 742639129. The next prime is 742639141. The reversal of 742639137 is 731936247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 742639137 - 2³ = 742639129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (742639637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394503 + ... + 396380.

It is an arithmetic number, because the mean of its divisors is an integer number (124168788).

Almost surely, 2^742639137 is an apocalyptic number.

It is an amenable number.

742639137 is a deficient number, since it is larger than the sum of its proper divisors (250711167).

742639137 is a wasteful number, since it uses less digits than its factorization.

742639137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791199.

The product of its digits is 190512, while the sum is 42.

The square root of 742639137 is about 27251.4061472064. The cubic root of 742639137 is about 905.5781688547.

The spelling of 742639137 in words is "seven hundred forty-two million, six hundred thirty-nine thousand, one hundred thirty-seven".