1187011355 has 4 divisors (see below), whose sum is σ = 1424413632. Its totient is φ = 949609080.

The previous prime is 1187011307. The next prime is 1187011369. The reversal of 1187011355 is 5531107811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5531107811 = 17 ⋅325359283.

It is not a de Polignac number, because 1187011355 - 2¹⁶ = 1186945819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118701131 + ... + 118701140.

It is an arithmetic number, because the mean of its divisors is an integer number (356103408).

Almost surely, 2^1187011355 is an apocalyptic number.

1187011355 is a deficient number, since it is larger than the sum of its proper divisors (237402277).

1187011355 is an equidigital number, since it uses as much as digits as its factorization.

1187011355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237402276.

The product of its (nonzero) digits is 4200, while the sum is 32.

The square root of 1187011355 is about 34453.0311438631. The cubic root of 1187011355 is about 1058.8106260298.

The spelling of 1187011355 in words is "one billion, one hundred eighty-seven million, eleven thousand, three hundred fifty-five".