313403989 has 2 divisors, whose sum is σ = 313403990. Its totient is φ = 313403988.

The previous prime is 313403969. The next prime is 313404001. The reversal of 313403989 is 989304313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226261764 + 87142225 = 15042^2 + 9335^2 .

It is a cyclic number.

It is not a de Polignac number, because 313403989 - 2⁷ = 313403861 is a prime.

It is a super-2 number, since 2×313403989² = 196444120642224242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313403939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156701994 + 156701995.

It is an arithmetic number, because the mean of its divisors is an integer number (156701995).

Almost surely, 2^313403989 is an apocalyptic number.

It is an amenable number.

313403989 is a deficient number, since it is larger than the sum of its proper divisors (1).

313403989 is an equidigital number, since it uses as much as digits as its factorization.

313403989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 313403989 is about 17703.2197354041. The cubic root of 313403989 is about 679.2581218473.

The spelling of 313403989 in words is "three hundred thirteen million, four hundred three thousand, nine hundred eighty-nine".