33400139 has 2 divisors, whose sum is σ = 33400140. Its totient is φ = 33400138.

The previous prime is 33400093. The next prime is 33400151. The reversal of 33400139 is 93100433.

It is a strong prime.

It is an emirp because it is prime and its reverse (93100433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33400139 - 2¹² = 33396043 is a prime.

It is a super-2 number, since 2×33400139² = 2231138570438642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33400039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16700069 + 16700070.

It is an arithmetic number, because the mean of its divisors is an integer number (16700070).

Almost surely, 2^33400139 is an apocalyptic number.

33400139 is a deficient number, since it is larger than the sum of its proper divisors (1).

33400139 is an equidigital number, since it uses as much as digits as its factorization.

33400139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 33400139 is about 5779.2853364408. The cubic root of 33400139 is about 322.0446519357.

The spelling of 33400139 in words is "thirty-three million, four hundred thousand, one hundred thirty-nine".