61187677 has 4 divisors (see below), whose sum is σ = 62841436. Its totient is φ = 59533920.

The previous prime is 61187647. The next prime is 61187701. The reversal of 61187677 is 77678116.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49857721 + 11329956 = 7061^2 + 3366^2 .

It is a cyclic number.

It is not a de Polignac number, because 61187677 - 2¹¹ = 61185629 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 (61187617) 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, 826824 + ... + 826897.

It is an arithmetic number, because the mean of its divisors is an integer number (15710359).

Almost surely, 2^61187677 is an apocalyptic number.

It is an amenable number.

61187677 is a deficient number, since it is larger than the sum of its proper divisors (1653759).

61187677 is a wasteful number, since it uses less digits than its factorization.

61187677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653758.

The product of its digits is 98784, while the sum is 43.

The square root of 61187677 is about 7822.2552374619. The cubic root of 61187677 is about 394.0530153609.

It can be divided in two parts, 611 and 87677, that added together give a palindrome (88288).

The spelling of 61187677 in words is "sixty-one million, one hundred eighty-seven thousand, six hundred seventy-seven".