33722989 has 2 divisors, whose sum is σ = 33722990. Its totient is φ = 33722988.

The previous prime is 33722987. The next prime is 33722993. The reversal of 33722989 is 98922733.

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., 33698025 + 24964 = 5805^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 33722989 - 2¹ = 33722987 is a prime.

It is a super-2 number, since 2×33722989² = 2274479974188242, which contains 22 as substring.

Together with 33722987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33722987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16861494 + 16861495.

It is an arithmetic number, because the mean of its divisors is an integer number (16861495).

Almost surely, 2^33722989 is an apocalyptic number.

It is an amenable number.

33722989 is a deficient number, since it is larger than the sum of its proper divisors (1).

33722989 is an equidigital number, since it uses as much as digits as its factorization.

33722989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 33722989 is about 5807.1498172511. The cubic root of 33722989 is about 323.0789679983.

The spelling of 33722989 in words is "thirty-three million, seven hundred twenty-two thousand, nine hundred eighty-nine".