61233139 has 12 divisors (see below), whose sum is σ = 67512928. Its totient is φ = 55495440.

The previous prime is 61233127. The next prime is 61233149. The reversal of 61233139 is 93133216.

It is not a de Polignac number, because 61233139 - 2¹⁵ = 61200371 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61233119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55477 + ... + 56569.

Almost surely, 2^61233139 is an apocalyptic number.

61233139 is a deficient number, since it is larger than the sum of its proper divisors (6279789).

61233139 is a wasteful number, since it uses less digits than its factorization.

61233139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1567 counting only the distinct ones).

The product of its digits is 2916, while the sum is 28.

The square root of 61233139 is about 7825.1606373288. The cubic root of 61233139 is about 394.1505840443.

The spelling of 61233139 in words is "sixty-one million, two hundred thirty-three thousand, one hundred thirty-nine".