33378139 has 2 divisors, whose sum is σ = 33378140. Its totient is φ = 33378138.

The previous prime is 33378113. The next prime is 33378167. The reversal of 33378139 is 93187333.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33378139 - 2¹⁵ = 33345371 is a prime.

It is a super-2 number, since 2×33378139² = 2228200326206642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33378098 and 33378107.

It is not a weakly prime, because it can be changed into another prime (33378179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16689069 + 16689070.

It is an arithmetic number, because the mean of its divisors is an integer number (16689070).

Almost surely, 2^33378139 is an apocalyptic number.

33378139 is a deficient number, since it is larger than the sum of its proper divisors (1).

33378139 is an equidigital number, since it uses as much as digits as its factorization.

33378139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 37.

The square root of 33378139 is about 5777.3816733880. The cubic root of 33378139 is about 321.9739282930.

It can be divided in two parts, 3337 and 8139, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 33378139 in words is "thirty-three million, three hundred seventy-eight thousand, one hundred thirty-nine".