311278977 has 16 divisors (see below), whose sum is σ = 461433280. Its totient is φ = 207393696.

The previous prime is 311278951. The next prime is 311278997. The reversal of 311278977 is 779872113.

It is not a de Polignac number, because 311278977 - 2¹² = 311274881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311278907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70293 + ... + 74589.

It is an arithmetic number, because the mean of its divisors is an integer number (28839580).

Almost surely, 2^311278977 is an apocalyptic number.

It is an amenable number.

311278977 is a deficient number, since it is larger than the sum of its proper divisors (150154303).

311278977 is a wasteful number, since it uses less digits than its factorization.

311278977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6989 (or 6983 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 311278977 is about 17643.0999827128. The cubic root of 311278977 is about 677.7194194958.

It can be divided in two parts, 31127 and 8977, that added together give a palindrome (40104).

The spelling of 311278977 in words is "three hundred eleven million, two hundred seventy-eight thousand, nine hundred seventy-seven".