312040661 has 8 divisors (see below), whose sum is σ = 337426560. Its totient is φ = 287435968.

The previous prime is 312040657. The next prime is 312040679. The reversal of 312040661 is 166040213.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 312040661 - 2² = 312040657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312040061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194471 + ... + 196068.

It is an arithmetic number, because the mean of its divisors is an integer number (42178320).

Almost surely, 2^312040661 is an apocalyptic number.

It is an amenable number.

312040661 is a deficient number, since it is larger than the sum of its proper divisors (25385899).

312040661 is a wasteful number, since it uses less digits than its factorization.

312040661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390603.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 312040661 is about 17664.6726830700. The cubic root of 312040661 is about 678.2717510086.

Adding to 312040661 its reverse (166040213), we get a palindrome (478080874).

The spelling of 312040661 in words is "three hundred twelve million, forty thousand, six hundred sixty-one".