60115991 has 8 divisors (see below), whose sum is σ = 64809360. Its totient is φ = 55432512.

The previous prime is 60115933. The next prime is 60116003. The reversal of 60115991 is 19951106.

It is a happy number.

60115991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60115991 is a prime.

It is a super-2 number, since 2×60115991² = 7227864747824162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60115901) 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 7 ways as a sum of consecutive naturals, for example, 14531 + ... + 18203.

It is an arithmetic number, because the mean of its divisors is an integer number (8101170).

Almost surely, 2^60115991 is an apocalyptic number.

60115991 is a deficient number, since it is larger than the sum of its proper divisors (4693369).

60115991 is a wasteful number, since it uses less digits than its factorization.

60115991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 60115991 is about 7753.4502642372. The cubic root of 60115991 is about 391.7388736245.

The spelling of 60115991 in words is "sixty million, one hundred fifteen thousand, nine hundred ninety-one".