312661763 has 4 divisors (see below), whose sum is σ = 312830568. Its totient is φ = 312492960.

The previous prime is 312661759. The next prime is 312661781. The reversal of 312661763 is 367166213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 367166213 = 12041 ⋅30493.

It is a cyclic number.

It is not a de Polignac number, because 312661763 - 2² = 312661759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312661733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81593 + ... + 85338.

It is an arithmetic number, because the mean of its divisors is an integer number (78207642).

Almost surely, 2^312661763 is an apocalyptic number.

312661763 is a deficient number, since it is larger than the sum of its proper divisors (168805).

312661763 is a wasteful number, since it uses less digits than its factorization.

312661763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168804.

The product of its digits is 27216, while the sum is 35.

The square root of 312661763 is about 17682.2442862890. The cubic root of 312661763 is about 678.7214752406.

The spelling of 312661763 in words is "three hundred twelve million, six hundred sixty-one thousand, seven hundred sixty-three".