61786131 has 16 divisors (see below), whose sum is σ = 92771328. Its totient is φ = 36237600.

The previous prime is 61786121. The next prime is 61786133. The reversal of 61786131 is 13168716.

61786131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61786131 - 2⁵ = 61786099 is a prime.

It is a super-2 number, since 2×61786131² = 7635051967898322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 61786092 and 61786101.

It is not an unprimeable number, because it can be changed into a prime (61786133) 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 15 ways as a sum of consecutive naturals, for example, 29176 + ... + 31221.

It is an arithmetic number, because the mean of its divisors is an integer number (5798208).

Almost surely, 2^61786131 is an apocalyptic number.

61786131 is a deficient number, since it is larger than the sum of its proper divisors (30985197).

61786131 is a wasteful number, since it uses less digits than its factorization.

61786131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60442.

The product of its digits is 6048, while the sum is 33.

The square root of 61786131 is about 7860.4154470359. The cubic root of 61786131 is about 395.3335451132. Note that the first 3 decimals are identical.

The spelling of 61786131 in words is "sixty-one million, seven hundred eighty-six thousand, one hundred thirty-one".