313528987 has 4 divisors (see below), whose sum is σ = 313894840. Its totient is φ = 313163136.

The previous prime is 313528951. The next prime is 313528991. The reversal of 313528987 is 789825313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313528987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313528907) 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, 181638 + ... + 183355.

It is an arithmetic number, because the mean of its divisors is an integer number (78473710).

Almost surely, 2^313528987 is an apocalyptic number.

313528987 is a deficient number, since it is larger than the sum of its proper divisors (365853).

313528987 is an equidigital number, since it uses as much as digits as its factorization.

313528987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365852.

The product of its digits is 362880, while the sum is 46.

The square root of 313528987 is about 17706.7497582137. The cubic root of 313528987 is about 679.3484149134.

The spelling of 313528987 in words is "three hundred thirteen million, five hundred twenty-eight thousand, nine hundred eighty-seven".