311769649 has 3 divisors (see below), whose sum is σ = 311787307. Its totient is φ = 311751992.

The previous prime is 311769593. The next prime is 311769671. The reversal of 311769649 is 946967113.

It is a happy number.

The square root of 311769649 is 17657.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 37271025 + 274498624 = 6105^2 + 16568^2 .

It is a de Polignac number, because none of the positive numbers 2^k-311769649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311769599 and 311769608.

It is not an unprimeable number, because it can be changed into a prime (311769149) 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 2 ways as a sum of consecutive naturals, for example, 8829 + ... + 26485.

Almost surely, 2^311769649 is an apocalyptic number.

311769649 is the 17657-th square number.

311769649 is the 8829-th centered octagonal number.

It is an amenable number.

311769649 is a deficient number, since it is larger than the sum of its proper divisors (17658).

311769649 is an frugal number, since it uses more digits than its factorization.

311769649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35314 (or 17657 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The cubic root of 311769649 is about 678.0753310659.

The spelling of 311769649 in words is "three hundred eleven million, seven hundred sixty-nine thousand, six hundred forty-nine".