60863991 has 4 divisors (see below), whose sum is σ = 81151992. Its totient is φ = 40575992.

The previous prime is 60863977. The next prime is 60863993. The reversal of 60863991 is 19936806.

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

It is a cyclic number.

It is not a de Polignac number, because 60863991 - 2²³ = 52475383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60863993) 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, 10143996 + ... + 10144001.

It is an arithmetic number, because the mean of its divisors is an integer number (20287998).

Almost surely, 2^60863991 is an apocalyptic number.

60863991 is a deficient number, since it is larger than the sum of its proper divisors (20288001).

60863991 is a wasteful number, since it uses less digits than its factorization.

60863991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20288000.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 60863991 is about 7801.5377330370. The cubic root of 60863991 is about 393.3569328143.

The spelling of 60863991 in words is "sixty million, eight hundred sixty-three thousand, nine hundred ninety-one".