641735434 has 8 divisors (see below), whose sum is σ = 965640708. Its totient is φ = 319855200.

The previous prime is 641735411. The next prime is 641735441. The reversal of 641735434 is 434537146.

It can be written as a sum of positive squares in 2 ways, for example, as 620159409 + 21576025 = 24903^2 + 4645^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 641735393 and 641735402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505467 + ... + 506734.

Almost surely, 2^641735434 is an apocalyptic number.

641735434 is a deficient number, since it is larger than the sum of its proper divisors (323905274).

641735434 is a wasteful number, since it uses less digits than its factorization.

641735434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012520.

The product of its digits is 120960, while the sum is 37.

The square root of 641735434 is about 25332.4975870916. The cubic root of 641735434 is about 862.5521061848.

The spelling of 641735434 in words is "six hundred forty-one million, seven hundred thirty-five thousand, four hundred thirty-four".