33631397 has 2 divisors, whose sum is σ = 33631398. Its totient is φ = 33631396.

The previous prime is 33631393. The next prime is 33631417. The reversal of 33631397 is 79313633.

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., 22335076 + 11296321 = 4726^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 33631397 - 2² = 33631393 is a prime.

It is a super-2 number, since 2×33631397² = 2262141728343218, 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 (33631393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16815698 + 16815699.

It is an arithmetic number, because the mean of its divisors is an integer number (16815699).

Almost surely, 2^33631397 is an apocalyptic number.

It is an amenable number.

33631397 is a deficient number, since it is larger than the sum of its proper divisors (1).

33631397 is an equidigital number, since it uses as much as digits as its factorization.

33631397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 35.

The square root of 33631397 is about 5799.2583146468. The cubic root of 33631397 is about 322.7862074765.

The spelling of 33631397 in words is "thirty-three million, six hundred thirty-one thousand, three hundred ninety-seven".