2351989 has 2 divisors, whose sum is σ = 2351990. Its totient is φ = 2351988.

The previous prime is 2351969. The next prime is 2352011. The reversal of 2351989 is 9891532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2235025 + 116964 = 1495^2 + 342^2 .

It is a cyclic number.

It is not a de Polignac number, because 2351989 - 2⁹ = 2351477 is a prime.

It is a super-2 number, since 2×2351989² = 11063704512242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2351969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1175994 + 1175995.

It is an arithmetic number, because the mean of its divisors is an integer number (1175995).

2^2351989 is an apocalyptic number.

It is an amenable number.

2351989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2351989 is an equidigital number, since it uses as much as digits as its factorization.

2351989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 2351989 is about 1533.6195747316. The cubic root of 2351989 is about 132.9877879001.

The spelling of 2351989 in words is "two million, three hundred fifty-one thousand, nine hundred eighty-nine".