33947780869 has 2 divisors, whose sum is σ = 33947780870. Its totient is φ = 33947780868.

The previous prime is 33947780861. The next prime is 33947780921. The reversal of 33947780869 is 96808774933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30646703844 + 3301077025 = 175062^2 + 57455^2 .

It is a cyclic number.

It is not a de Polignac number, because 33947780869 - 2³ = 33947780861 is a prime.

It is a super-2 number, since 2×33947780869² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33947780869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33947780861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16973890434 + 16973890435.

It is an arithmetic number, because the mean of its divisors is an integer number (16973890435).

Almost surely, 2^33947780869 is an apocalyptic number.

It is an amenable number.

33947780869 is a deficient number, since it is larger than the sum of its proper divisors (1).

33947780869 is an equidigital number, since it uses as much as digits as its factorization.

33947780869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54867456, while the sum is 64.

The spelling of 33947780869 in words is "thirty-three billion, nine hundred forty-seven million, seven hundred eighty thousand, eight hundred sixty-nine".