401650685 has 4 divisors (see below), whose sum is σ = 481980828. Its totient is φ = 321320544.

The previous prime is 401650649. The next prime is 401650693. The reversal of 401650685 is 586056104.

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 188403076 + 213247609 = 13726^2 + 14603^2 .

It is a cyclic number.

It is not a de Polignac number, because 401650685 - 2¹⁸ = 401388541 is a prime.

It is a super-2 number, since 2×401650685² = 322646545521938450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 40165064 + ... + 40165073.

It is an arithmetic number, because the mean of its divisors is an integer number (120495207).

Almost surely, 2^401650685 is an apocalyptic number.

It is an amenable number.

401650685 is a deficient number, since it is larger than the sum of its proper divisors (80330143).

401650685 is an equidigital number, since it uses as much as digits as its factorization.

401650685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80330142.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 401650685 is about 20041.2246382301. The cubic root of 401650685 is about 737.8184379901.

The spelling of 401650685 in words is "four hundred one million, six hundred fifty thousand, six hundred eighty-five".