33416989 has 2 divisors, whose sum is σ = 33416990. Its totient is φ = 33416988.

The previous prime is 33416947. The next prime is 33416993. The reversal of 33416989 is 98961433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23912100 + 9504889 = 4890^2 + 3083^2 .

It is a cyclic number.

It is not a de Polignac number, because 33416989 - 2¹³ = 33408797 is a prime.

It is a super-2 number, since 2×33416989² = 2233390307652242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33416909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16708494 + 16708495.

It is an arithmetic number, because the mean of its divisors is an integer number (16708495).

Almost surely, 2^33416989 is an apocalyptic number.

It is an amenable number.

33416989 is a deficient number, since it is larger than the sum of its proper divisors (1).

33416989 is an equidigital number, since it uses as much as digits as its factorization.

33416989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 33416989 is about 5780.7429453315. The cubic root of 33416989 is about 322.0987988173.

The spelling of 33416989 in words is "thirty-three million, four hundred sixteen thousand, nine hundred eighty-nine".