1354642687 has 4 divisors (see below), whose sum is σ = 1354741960. Its totient is φ = 1354543416.

The previous prime is 1354642669. The next prime is 1354642721. The reversal of 1354642687 is 7862464531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7862464531 = 379 ⋅20745289.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1354642687 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 (1354642657) 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 3 ways as a sum of consecutive naturals, for example, 25137 + ... + 57802.

It is an arithmetic number, because the mean of its divisors is an integer number (338685490).

Almost surely, 2^1354642687 is an apocalyptic number.

1354642687 is a deficient number, since it is larger than the sum of its proper divisors (99273).

1354642687 is an equidigital number, since it uses as much as digits as its factorization.

1354642687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99272.

The product of its digits is 967680, while the sum is 46.

The square root of 1354642687 is about 36805.4708840955. The cubic root of 1354642687 is about 1106.4749485331.

The spelling of 1354642687 in words is "one billion, three hundred fifty-four million, six hundred forty-two thousand, six hundred eighty-seven".