789734457 has 6 divisors (see below), whose sum is σ = 1140727562. Its totient is φ = 526489632.

The previous prime is 789734353. The next prime is 789734461. The reversal of 789734457 is 754437987.

789734457 is a `hidden beast` number, since 78 + 97 + 34 + 457 = 666.

It can be written as a sum of positive squares in only one way, i.e., 787139136 + 2595321 = 28056^2 + 1611^2 .

It is a de Polignac number, because none of the positive numbers 2^k-789734457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789734557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43874128 + ... + 43874145.

Almost surely, 2^789734457 is an apocalyptic number.

It is an amenable number.

789734457 is a deficient number, since it is larger than the sum of its proper divisors (350993105).

789734457 is a wasteful number, since it uses less digits than its factorization.

789734457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87748279 (or 87748276 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The square root of 789734457 is about 28102.2144501105. The cubic root of 789734457 is about 924.3299581974.

The spelling of 789734457 in words is "seven hundred eighty-nine million, seven hundred thirty-four thousand, four hundred fifty-seven".