33491641 has 2 divisors, whose sum is σ = 33491642. Its totient is φ = 33491640.

The previous prime is 33491639. The next prime is 33491671. The reversal of 33491641 is 14619433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28132416 + 5359225 = 5304^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 33491641 - 2¹ = 33491639 is a prime.

It is a super-2 number, since 2×33491641² = 2243380033745762, which contains 22 as substring.

Together with 33491639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (33491621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16745820 + 16745821.

It is an arithmetic number, because the mean of its divisors is an integer number (16745821).

Almost surely, 2^33491641 is an apocalyptic number.

It is an amenable number.

33491641 is a deficient number, since it is larger than the sum of its proper divisors (1).

33491641 is an equidigital number, since it uses as much as digits as its factorization.

33491641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 33491641 is about 5787.1962987270. The cubic root of 33491641 is about 322.3384716809.

The spelling of 33491641 in words is "thirty-three million, four hundred ninety-one thousand, six hundred forty-one".