187401311749 has 4 divisors (see below), whose sum is σ = 187402644864. Its totient is φ = 187399978636.

The previous prime is 187401311743. The next prime is 187401311753. The reversal of 187401311749 is 947113104781.

187401311749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 187401311749 - 2⁵ = 187401311717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 187401311699 and 187401311708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187401311743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426997 + ... + 746410.

It is an arithmetic number, because the mean of its divisors is an integer number (46850661216).

Almost surely, 2^187401311749 is an apocalyptic number.

It is an amenable number.

187401311749 is a deficient number, since it is larger than the sum of its proper divisors (1333115).

187401311749 is a wasteful number, since it uses less digits than its factorization.

187401311749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333114.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 187401311749 in words is "one hundred eighty-seven billion, four hundred one million, three hundred eleven thousand, seven hundred forty-nine".