61140939 has 8 divisors (see below), whose sum is σ = 81878160. Its totient is φ = 40582176.

The previous prime is 61140929. The next prime is 61140991. The reversal of 61140939 is 93904116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61140939 - 2⁵ = 61140907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61140929) 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 7 ways as a sum of consecutive naturals, for example, 43812 + ... + 45185.

It is an arithmetic number, because the mean of its divisors is an integer number (10234770).

Almost surely, 2^61140939 is an apocalyptic number.

61140939 is a deficient number, since it is larger than the sum of its proper divisors (20737221).

61140939 is a wasteful number, since it uses less digits than its factorization.

61140939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89229.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 61140939 is about 7819.2671651505. The cubic root of 61140939 is about 393.9526577832.

The spelling of 61140939 in words is "sixty-one million, one hundred forty thousand, nine hundred thirty-nine".