1187712656723 has 4 divisors (see below), whose sum is σ = 1190948931360. Its totient is φ = 1184476382088.

The previous prime is 1187712656693. The next prime is 1187712656729. The reversal of 1187712656723 is 3276562177811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1187712656723 - 2¹⁴ = 1187712640339 is a prime.

It is a super-2 number, since 2×1187712656723² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187712656729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618136768 + ... + 1618137501.

It is an arithmetic number, because the mean of its divisors is an integer number (297737232840).

Almost surely, 2^{1187712656723} is an apocalyptic number.

1187712656723 is a deficient number, since it is larger than the sum of its proper divisors (3236274637).

1187712656723 is an equidigital number, since it uses as much as digits as its factorization.

1187712656723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236274636.

The product of its digits is 5927040, while the sum is 56.

The spelling of 1187712656723 in words is "one trillion, one hundred eighty-seven billion, seven hundred twelve million, six hundred fifty-six thousand, seven hundred twenty-three".