34881989 has 2 divisors, whose sum is σ = 34881990. Its totient is φ = 34881988.

The previous prime is 34881971. The next prime is 34881997. The reversal of 34881989 is 98918843.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32376100 + 2505889 = 5690^2 + 1583^2 .

It is an emirp because it is prime and its reverse (98918843) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34881989 - 2⁸ = 34881733 is a prime.

It is a super-2 number, since 2×34881989² = 2433506313192242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34881949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17440994 + 17440995.

It is an arithmetic number, because the mean of its divisors is an integer number (17440995).

Almost surely, 2^34881989 is an apocalyptic number.

It is an amenable number.

34881989 is a deficient number, since it is larger than the sum of its proper divisors (1).

34881989 is an equidigital number, since it uses as much as digits as its factorization.

34881989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 34881989 is about 5906.0976117907. The cubic root of 34881989 is about 326.7385772319.

The spelling of 34881989 in words is "thirty-four million, eight hundred eighty-one thousand, nine hundred eighty-nine".