311393077 has 4 divisors (see below), whose sum is σ = 311789536. Its totient is φ = 310996620.

The previous prime is 311393059. The next prime is 311393087. The reversal of 311393077 is 770393113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311393077 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 (311393087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197049 + ... + 198622.

It is an arithmetic number, because the mean of its divisors is an integer number (77947384).

Almost surely, 2^311393077 is an apocalyptic number.

It is an amenable number.

311393077 is a deficient number, since it is larger than the sum of its proper divisors (396459).

311393077 is an equidigital number, since it uses as much as digits as its factorization.

311393077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396458.

The product of its (nonzero) digits is 11907, while the sum is 34.

The square root of 311393077 is about 17646.3332451816. Note that the first 3 decimals coincide. The cubic root of 311393077 is about 677.8022158995.

The spelling of 311393077 in words is "three hundred eleven million, three hundred ninety-three thousand, seventy-seven".