61139167 has 4 divisors (see below), whose sum is σ = 61280800. Its totient is φ = 60997536.

The previous prime is 61139153. The next prime is 61139171. The reversal of 61139167 is 76193116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61139167 - 2¹⁵ = 61106399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61139467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70167 + ... + 71032.

It is an arithmetic number, because the mean of its divisors is an integer number (15320200).

Almost surely, 2^61139167 is an apocalyptic number.

61139167 is a deficient number, since it is larger than the sum of its proper divisors (141633).

61139167 is a wasteful number, since it uses less digits than its factorization.

61139167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141632.

The product of its digits is 6804, while the sum is 34.

The square root of 61139167 is about 7819.1538544781. The cubic root of 61139167 is about 393.9488518726.

The spelling of 61139167 in words is "sixty-one million, one hundred thirty-nine thousand, one hundred sixty-seven".