1318643487 has 12 divisors (see below), whose sum is σ = 2176808400. Its totient is φ = 753510528.

The previous prime is 1318643477. The next prime is 1318643509. The reversal of 1318643487 is 7843468131.

1318643487 is a `hidden beast` number, since 131 + 8 + 6 + 434 + 87 = 666.

It is not a de Polignac number, because 1318643487 - 2⁶ = 1318643423 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318643467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10465362 + ... + 10465487.

It is an arithmetic number, because the mean of its divisors is an integer number (181400700).

Almost surely, 2^1318643487 is an apocalyptic number.

1318643487 is a deficient number, since it is larger than the sum of its proper divisors (858164913).

1318643487 is a wasteful number, since it uses less digits than its factorization.

1318643487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20930862 (or 20930859 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1318643487 is about 36313.1310547576. The cubic root of 1318643487 is about 1096.5854134401.

The spelling of 1318643487 in words is "one billion, three hundred eighteen million, six hundred forty-three thousand, four hundred eighty-seven".