188940769 has 4 divisors (see below), whose sum is σ = 198885040. Its totient is φ = 178996500.

The previous prime is 188940767. The next prime is 188940781. The reversal of 188940769 is 967049881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 188940769 - 2¹ = 188940767 is a prime.

It is a super-2 number, since 2×188940769² = 71397228380622722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188940761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4972107 + ... + 4972144.

It is an arithmetic number, because the mean of its divisors is an integer number (49721260).

Almost surely, 2^188940769 is an apocalyptic number.

188940769 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

188940769 is a deficient number, since it is larger than the sum of its proper divisors (9944271).

188940769 is an equidigital number, since it uses as much as digits as its factorization.

188940769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9944270.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 188940769 is about 13745.5727054205. The cubic root of 188940769 is about 573.8193989242.

The spelling of 188940769 in words is "one hundred eighty-eight million, nine hundred forty thousand, seven hundred sixty-nine".