700440409 has 4 divisors (see below), whose sum is σ = 741642804. Its totient is φ = 659238016.

The previous prime is 700440401. The next prime is 700440439. The reversal of 700440409 is 904044007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904044007 = 223 ⋅4054009.

It can be written as a sum of positive squares in 2 ways, for example, as 344288025 + 356152384 = 18555^2 + 18872^2 .

It is a cyclic number.

It is not a de Polignac number, because 700440409 - 2³ = 700440401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (700440401) 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, 20601172 + ... + 20601205.

It is an arithmetic number, because the mean of its divisors is an integer number (185410701).

Almost surely, 2^700440409 is an apocalyptic number.

It is an amenable number.

700440409 is a deficient number, since it is larger than the sum of its proper divisors (41202395).

700440409 is a wasteful number, since it uses less digits than its factorization.

700440409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41202394.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 700440409 is about 26465.8347497297. The cubic root of 700440409 is about 888.0901726634.

The spelling of 700440409 in words is "seven hundred million, four hundred forty thousand, four hundred nine".