60909987 has 4 divisors (see below), whose sum is σ = 81213320. Its totient is φ = 40606656.

The previous prime is 60909967. The next prime is 60910001. The reversal of 60909987 is 78990906.

It is a happy number.

60909987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 60909987 - 2¹⁴ = 60893603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60909907) 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 3 ways as a sum of consecutive naturals, for example, 10151662 + ... + 10151667.

It is an arithmetic number, because the mean of its divisors is an integer number (20303330).

Almost surely, 2^60909987 is an apocalyptic number.

60909987 is a deficient number, since it is larger than the sum of its proper divisors (20303333).

60909987 is a wasteful number, since it uses less digits than its factorization.

60909987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20303332.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 60909987 is about 7804.4850566838. The cubic root of 60909987 is about 393.4559968060.

The spelling of 60909987 in words is "sixty million, nine hundred nine thousand, nine hundred eighty-seven".