314128891 has 4 divisors (see below), whose sum is σ = 314638632. Its totient is φ = 313619152.

The previous prime is 314128883. The next prime is 314128973. The reversal of 314128891 is 198821413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 314128891 - 2³ = 314128883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 314128891.

It is not an unprimeable number, because it can be changed into a prime (314128811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253945 + ... + 255178.

It is an arithmetic number, because the mean of its divisors is an integer number (78659658).

Almost surely, 2^314128891 is an apocalyptic number.

314128891 is a deficient number, since it is larger than the sum of its proper divisors (509741).

314128891 is an equidigital number, since it uses as much as digits as its factorization.

314128891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509740.

The product of its digits is 13824, while the sum is 37.

The square root of 314128891 is about 17723.6816434961. The cubic root of 314128891 is about 679.7814255694.

The spelling of 314128891 in words is "three hundred fourteen million, one hundred twenty-eight thousand, eight hundred ninety-one".