700890409 has 4 divisors (see below), whose sum is σ = 707830020. Its totient is φ = 693950800.

The previous prime is 700890349. The next prime is 700890457. The reversal of 700890409 is 904098007.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 432848025 + 268042384 = 20805^2 + 16372^2 .

It is not a de Polignac number, because 700890409 - 2¹⁷ = 700759337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (700890209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3469654 + ... + 3469855.

It is an arithmetic number, because the mean of its divisors is an integer number (176957505).

Almost surely, 2^700890409 is an apocalyptic number.

It is an amenable number.

700890409 is a deficient number, since it is larger than the sum of its proper divisors (6939611).

700890409 is a wasteful number, since it uses less digits than its factorization.

700890409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6939610.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 700890409 is about 26474.3349113816. The cubic root of 700890409 is about 888.2803173303.

The spelling of 700890409 in words is "seven hundred million, eight hundred ninety thousand, four hundred nine".