61687995 has 16 divisors (see below), whose sum is σ = 100092672. Its totient is φ = 32436320.

The previous prime is 61687987. The next prime is 61687999. The reversal of 61687995 is 59978616.

It is not a de Polignac number, because 61687995 - 2³ = 61687987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61687999) 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, 27897 + ... + 30026.

It is an arithmetic number, because the mean of its divisors is an integer number (6255792).

Almost surely, 2^61687995 is an apocalyptic number.

61687995 is a deficient number, since it is larger than the sum of its proper divisors (38404677).

61687995 is a wasteful number, since it uses less digits than its factorization.

61687995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58002.

The product of its digits is 816480, while the sum is 51.

The square root of 61687995 is about 7854.1705481865. The cubic root of 61687995 is about 395.1241291237.

The spelling of 61687995 in words is "sixty-one million, six hundred eighty-seven thousand, nine hundred ninety-five".