61389111 has 16 divisors (see below), whose sum is σ = 95456000. Its totient is φ = 35078904.

The previous prime is 61389103. The next prime is 61389121. The reversal of 61389111 is 11198316.

It is not a de Polignac number, because 61389111 - 2³ = 61389103 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 (61389101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28801 + ... + 30858.

It is an arithmetic number, because the mean of its divisors is an integer number (5966000).

Almost surely, 2^61389111 is an apocalyptic number.

61389111 is a deficient number, since it is larger than the sum of its proper divisors (34066889).

61389111 is an equidigital number, since it uses as much as digits as its factorization.

61389111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59683 (or 59669 counting only the distinct ones).

The product of its digits is 1296, while the sum is 30.

The square root of 61389111 is about 7835.1203564464. The cubic root of 61389111 is about 394.4849581668.

The spelling of 61389111 in words is "sixty-one million, three hundred eighty-nine thousand, one hundred eleven".