61089687 has 24 divisors (see below), whose sum is σ = 96152400. Its totient is φ = 38325888.

The previous prime is 61089683. The next prime is 61089703. The reversal of 61089687 is 78698016.

It is a happy number.

It is not a de Polignac number, because 61089687 - 2² = 61089683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61089683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3889 + ... + 11717.

It is an arithmetic number, because the mean of its divisors is an integer number (4006350).

Almost surely, 2^61089687 is an apocalyptic number.

61089687 is a deficient number, since it is larger than the sum of its proper divisors (35062713).

61089687 is a wasteful number, since it uses less digits than its factorization.

61089687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7872 (or 7849 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 61089687 is about 7815.9891888359. The cubic root of 61089687 is about 393.8425487668.

It can be divided in two parts, 61089 and 687, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 61089687 in words is "sixty-one million, eighty-nine thousand, six hundred eighty-seven".