33889897807 has 2 divisors, whose sum is σ = 33889897808. Its totient is φ = 33889897806.

The previous prime is 33889897777. The next prime is 33889897813. The reversal of 33889897807 is 70879898833.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33889897807 is a prime.

It is a super-2 number, since 2×33889897807² (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 (33889897897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16944948903 + 16944948904.

It is an arithmetic number, because the mean of its divisors is an integer number (16944948904).

Almost surely, 2^33889897807 is an apocalyptic number.

33889897807 is a deficient number, since it is larger than the sum of its proper divisors (1).

33889897807 is an equidigital number, since it uses as much as digits as its factorization.

33889897807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 146313216, while the sum is 70.

The spelling of 33889897807 in words is "thirty-three billion, eight hundred eighty-nine million, eight hundred ninety-seven thousand, eight hundred seven".