61201139 has 8 divisors (see below), whose sum is σ = 65376720. Its totient is φ = 57089536.

The previous prime is 61201103. The next prime is 61201141. The reversal of 61201139 is 93110216.

It is a happy number.

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

It is not a de Polignac number, because 61201139 - 2⁸ = 61200883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61201199) 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, 14009 + ... + 17850.

It is an arithmetic number, because the mean of its divisors is an integer number (8172090).

Almost surely, 2^61201139 is an apocalyptic number.

61201139 is a deficient number, since it is larger than the sum of its proper divisors (4175581).

61201139 is a wasteful number, since it uses less digits than its factorization.

61201139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31989.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 61201139 is about 7823.1156836647. The cubic root of 61201139 is about 394.0819119893.

The spelling of 61201139 in words is "sixty-one million, two hundred one thousand, one hundred thirty-nine".