34099987981 has 2 divisors, whose sum is σ = 34099987982. Its totient is φ = 34099987980.

The previous prime is 34099987919. The next prime is 34099988023. The reversal of 34099987981 is 18978999043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32822568900 + 1277419081 = 181170^2 + 35741^2 .

It is a cyclic number.

It is not a de Polignac number, because 34099987981 - 2¹⁵ = 34099955213 is a prime.

It is a super-2 number, since 2×34099987981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34099984981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17049993990 + 17049993991.

It is an arithmetic number, because the mean of its divisors is an integer number (17049993991).

Almost surely, 2^34099987981 is an apocalyptic number.

It is an amenable number.

34099987981 is a deficient number, since it is larger than the sum of its proper divisors (1).

34099987981 is an equidigital number, since it uses as much as digits as its factorization.

34099987981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35271936, while the sum is 67.

The spelling of 34099987981 in words is "thirty-four billion, ninety-nine million, nine hundred eighty-seven thousand, nine hundred eighty-one".