326742989 has 2 divisors, whose sum is σ = 326742990. Its totient is φ = 326742988.

The previous prime is 326742961. The next prime is 326743031. The reversal of 326742989 is 989247623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326524900 + 218089 = 18070^2 + 467^2 .

It is a cyclic number.

It is not a de Polignac number, because 326742989 - 2²⁸ = 58307533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326742089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163371494 + 163371495.

It is an arithmetic number, because the mean of its divisors is an integer number (163371495).

Almost surely, 2^326742989 is an apocalyptic number.

It is an amenable number.

326742989 is a deficient number, since it is larger than the sum of its proper divisors (1).

326742989 is an equidigital number, since it uses as much as digits as its factorization.

326742989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 326742989 is about 18076.0335527460. The cubic root of 326742989 is about 688.7613350967.

The spelling of 326742989 in words is "three hundred twenty-six million, seven hundred forty-two thousand, nine hundred eighty-nine".