33657423997 has 2 divisors, whose sum is σ = 33657423998. Its totient is φ = 33657423996.

The previous prime is 33657423949. The next prime is 33657424051. The reversal of 33657423997 is 79932475633.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33040696441 + 616727556 = 181771^2 + 24834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33657423997 is a prime.

It is a super-2 number, since 2×33657423997² (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 (33657423697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16828711998 + 16828711999.

It is an arithmetic number, because the mean of its divisors is an integer number (16828711999).

Almost surely, 2^33657423997 is an apocalyptic number.

It is an amenable number.

33657423997 is a deficient number, since it is larger than the sum of its proper divisors (1).

33657423997 is an equidigital number, since it uses as much as digits as its factorization.

33657423997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25719120, while the sum is 58.

The spelling of 33657423997 in words is "thirty-three billion, six hundred fifty-seven million, four hundred twenty-three thousand, nine hundred ninety-seven".