188978983 has 2 divisors, whose sum is σ = 188978984. Its totient is φ = 188978982.

The previous prime is 188978939. The next prime is 188979059. The reversal of 188978983 is 389879881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 188978983 - 2¹³ = 188970791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188978483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94489491 + 94489492.

It is an arithmetic number, because the mean of its divisors is an integer number (94489492).

Almost surely, 2^188978983 is an apocalyptic number.

188978983 is a deficient number, since it is larger than the sum of its proper divisors (1).

188978983 is an equidigital number, since it uses as much as digits as its factorization.

188978983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 61.

The square root of 188978983 is about 13746.9626827165. The cubic root of 188978983 is about 573.8580820460.

The spelling of 188978983 in words is "one hundred eighty-eight million, nine hundred seventy-eight thousand, nine hundred eighty-three".