311453987 has 12 divisors (see below), whose sum is σ = 341060760. Its totient is φ = 284251968.

The previous prime is 311453981. The next prime is 311454001. The reversal of 311453987 is 789354113.

It is not a de Polignac number, because 311453987 - 2⁸ = 311453731 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311453981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4688 + ... + 25394.

It is an arithmetic number, because the mean of its divisors is an integer number (28421730).

Almost surely, 2^311453987 is an apocalyptic number.

311453987 is a deficient number, since it is larger than the sum of its proper divisors (29606773).

311453987 is a wasteful number, since it uses less digits than its factorization.

311453987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20822 (or 20809 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 311453987 is about 17648.0590150872. The cubic root of 311453987 is about 677.8464068214.

The spelling of 311453987 in words is "three hundred eleven million, four hundred fifty-three thousand, nine hundred eighty-seven".