1213040187 has 6 divisors (see below), whose sum is σ = 1752169172. Its totient is φ = 808693452.

The previous prime is 1213040131. The next prime is 1213040201. The reversal of 1213040187 is 7810403121.

It is not a de Polignac number, because 1213040187 - 2¹¹ = 1213038139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213040187.

It is not an unprimeable number, because it can be changed into a prime (1213040107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67391113 + ... + 67391130.

Almost surely, 2^1213040187 is an apocalyptic number.

1213040187 is a deficient number, since it is larger than the sum of its proper divisors (539128985).

1213040187 is a wasteful number, since it uses less digits than its factorization.

1213040187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134782249 (or 134782246 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1213040187 is about 34828.7264625051. The cubic root of 1213040187 is about 1066.4939504313.

The spelling of 1213040187 in words is "one billion, two hundred thirteen million, forty thousand, one hundred eighty-seven".