1868189077 has 16 divisors (see below), whose sum is σ = 1975622400. Its totient is φ = 1764060480.

The previous prime is 1868189047. The next prime is 1868189093. The reversal of 1868189077 is 7709818681.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868189077 is a prime.

It is a super-2 number, since 2×1868189077² = 6980260854844223858, 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 (1868189017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241327 + ... + 248947.

It is an arithmetic number, because the mean of its divisors is an integer number (123476400).

Almost surely, 2^1868189077 is an apocalyptic number.

It is an amenable number.

1868189077 is a deficient number, since it is larger than the sum of its proper divisors (107433323).

1868189077 is a wasteful number, since it uses less digits than its factorization.

1868189077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836.

The product of its (nonzero) digits is 1354752, while the sum is 55.

The square root of 1868189077 is about 43222.5528746278. The cubic root of 1868189077 is about 1231.6111429229.

The spelling of 1868189077 in words is "one billion, eight hundred sixty-eight million, one hundred eighty-nine thousand, seventy-seven".