2651989 has 2 divisors, whose sum is σ = 2651990. Its totient is φ = 2651988.

The previous prime is 2651959. The next prime is 2652007. The reversal of 2651989 is 9891562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1340964 + 1311025 = 1158^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651989 - 2²¹ = 554837 is a prime.

It is a super-2 number, since 2×2651989² = 14066091312242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2651959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325994 + 1325995.

It is an arithmetic number, because the mean of its divisors is an integer number (1325995).

2^2651989 is an apocalyptic number.

It is an amenable number.

2651989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2651989 is an equidigital number, since it uses as much as digits as its factorization.

2651989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 2651989 is about 1628.4928615134. The cubic root of 2651989 is about 138.4173635036.

The spelling of 2651989 in words is "two million, six hundred fifty-one thousand, nine hundred eighty-nine".