188949487 has 4 divisors (see below), whose sum is σ = 190820376. Its totient is φ = 187078600.

The previous prime is 188949479. The next prime is 188949517. The reversal of 188949487 is 784949881.

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 188949487 - 2³ = 188949479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188949427) 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, 935293 + ... + 935494.

It is an arithmetic number, because the mean of its divisors is an integer number (47705094).

Almost surely, 2^188949487 is an apocalyptic number.

188949487 is a deficient number, since it is larger than the sum of its proper divisors (1870889).

188949487 is a wasteful number, since it uses less digits than its factorization.

188949487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870888.

The product of its digits is 4644864, while the sum is 58.

The square root of 188949487 is about 13745.8898220523. The cubic root of 188949487 is about 573.8282244071.

The spelling of 188949487 in words is "one hundred eighty-eight million, nine hundred forty-nine thousand, four hundred eighty-seven".