31422609 has 6 divisors (see below), whose sum is σ = 45388226. Its totient is φ = 20948400.

The previous prime is 31422593. The next prime is 31422641. The reversal of 31422609 is 90622413.

31422609 is a `hidden beast` number, since 31 + 4 + 22 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16769025 + 14653584 = 4095^2 + 3828^2 .

It is not a de Polignac number, because 31422609 - 2⁴ = 31422593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31422659) 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, 1745692 + ... + 1745709.

Almost surely, 2^31422609 is an apocalyptic number.

It is an amenable number.

31422609 is a deficient number, since it is larger than the sum of its proper divisors (13965617).

31422609 is a wasteful number, since it uses less digits than its factorization.

31422609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491407 (or 3491404 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 31422609 is about 5605.5873019693. The cubic root of 31422609 is about 315.5591278929.

The spelling of 31422609 in words is "thirty-one million, four hundred twenty-two thousand, six hundred nine".