1172741887 has 4 divisors (see below), whose sum is σ = 1172913520. Its totient is φ = 1172570256.

The previous prime is 1172741833. The next prime is 1172741893. The reversal of 1172741887 is 7881472711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7881472711 = 7 ⋅1125924673.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172741887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172741387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75123 + ... + 89380.

It is an arithmetic number, because the mean of its divisors is an integer number (293228380).

Almost surely, 2^1172741887 is an apocalyptic number.

1172741887 is a deficient number, since it is larger than the sum of its proper divisors (171633).

1172741887 is an equidigital number, since it uses as much as digits as its factorization.

1172741887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171632.

The product of its digits is 175616, while the sum is 46.

The square root of 1172741887 is about 34245.3191983956. The cubic root of 1172741887 is about 1054.5507358393.

The spelling of 1172741887 in words is "one billion, one hundred seventy-two million, seven hundred forty-one thousand, eight hundred eighty-seven".