33381949 has 2 divisors, whose sum is σ = 33381950. Its totient is φ = 33381948.

The previous prime is 33381899. The next prime is 33381973. The reversal of 33381949 is 94918333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17724100 + 15657849 = 4210^2 + 3957^2 .

It is a cyclic number.

It is not a de Polignac number, because 33381949 - 2¹³ = 33373757 is a prime.

It is a super-2 number, since 2×33381949² = 2228709038077202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33381979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16690974 + 16690975.

It is an arithmetic number, because the mean of its divisors is an integer number (16690975).

Almost surely, 2^33381949 is an apocalyptic number.

It is an amenable number.

33381949 is a deficient number, since it is larger than the sum of its proper divisors (1).

33381949 is an equidigital number, since it uses as much as digits as its factorization.

33381949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 33381949 is about 5777.7113981230. The cubic root of 33381949 is about 321.9861785665.

The spelling of 33381949 in words is "thirty-three million, three hundred eighty-one thousand, nine hundred forty-nine".