1356684987 has 16 divisors (see below), whose sum is σ = 2176136960. Its totient is φ = 734445792.

The previous prime is 1356684977. The next prime is 1356685007. The reversal of 1356684987 is 7894866531.

It is not a de Polignac number, because 1356684987 - 2⁸ = 1356684731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356684977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1699708 + ... + 1700505.

It is an arithmetic number, because the mean of its divisors is an integer number (136008560).

Almost surely, 2^1356684987 is an apocalyptic number.

1356684987 is a deficient number, since it is larger than the sum of its proper divisors (819451973).

1356684987 is a wasteful number, since it uses less digits than its factorization.

1356684987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400242.

The product of its digits is 8709120, while the sum is 57.

The square root of 1356684987 is about 36833.2049515108. The cubic root of 1356684987 is about 1107.0307209482.

The spelling of 1356684987 in words is "one billion, three hundred fifty-six million, six hundred eighty-four thousand, nine hundred eighty-seven".