61161907 has 4 divisors (see below), whose sum is σ = 61187896. Its totient is φ = 61135920.

The previous prime is 61161887. The next prime is 61161911. The reversal of 61161907 is 70916116.

61161907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61161907 - 2¹¹ = 61159859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61167907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9069 + ... + 14302.

It is an arithmetic number, because the mean of its divisors is an integer number (15296974).

Almost surely, 2^61161907 is an apocalyptic number.

61161907 is a deficient number, since it is larger than the sum of its proper divisors (25989).

61161907 is a wasteful number, since it uses less digits than its factorization.

61161907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25988.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 61161907 is about 7820.6078408267. The cubic root of 61161907 is about 393.9976873785.

The spelling of 61161907 in words is "sixty-one million, one hundred sixty-one thousand, nine hundred seven".