1874640181 has 2 divisors, whose sum is σ = 1874640182. Its totient is φ = 1874640180.

The previous prime is 1874640179. The next prime is 1874640221. The reversal of 1874640181 is 1810464781.

It is an a-pointer prime, because the next prime (1874640221) can be obtained adding 1874640181 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1653642225 + 220997956 = 40665^2 + 14866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1874640181 - 2¹ = 1874640179 is a prime.

It is a super-2 number, since 2×1874640181² = 7028551616439425522, which contains 22 as substring.

Together with 1874640179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1874643181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 937320090 + 937320091.

It is an arithmetic number, because the mean of its divisors is an integer number (937320091).

Almost surely, 2^1874640181 is an apocalyptic number.

1874640181 is the 27384-th centered pentagonal number.

It is an amenable number.

1874640181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1874640181 is an equidigital number, since it uses as much as digits as its factorization.

1874640181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 1874640181 is about 43297.1151579410. The cubic root of 1874640181 is about 1233.0271530112.

The spelling of 1874640181 in words is "one billion, eight hundred seventy-four million, six hundred forty thousand, one hundred eighty-one".