789097138 has 4 divisors (see below), whose sum is σ = 1183645710. Its totient is φ = 394548568.

The previous prime is 789097117. The next prime is 789097201. The reversal of 789097138 is 831790987.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 689955289 + 99141849 = 26267^2 + 9957^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197274283 + ... + 197274286.

Almost surely, 2^789097138 is an apocalyptic number.

789097138 is a deficient number, since it is larger than the sum of its proper divisors (394548572).

789097138 is a wasteful number, since it uses less digits than its factorization.

789097138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394548571.

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 789097138 is about 28090.8728593470. The cubic root of 789097138 is about 924.0812452377.

The spelling of 789097138 in words is "seven hundred eighty-nine million, ninety-seven thousand, one hundred thirty-eight".