1343686987 has 4 divisors (see below), whose sum is σ = 1422727416. Its totient is φ = 1264646560.

The previous prime is 1343686963. The next prime is 1343686991. The reversal of 1343686987 is 7896863431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1343686987 - 2¹⁵ = 1343654219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1343686937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39520189 + ... + 39520222.

It is an arithmetic number, because the mean of its divisors is an integer number (355681854).

Almost surely, 2^1343686987 is an apocalyptic number.

1343686987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1343686987 is a deficient number, since it is larger than the sum of its proper divisors (79040429).

1343686987 is an equidigital number, since it uses as much as digits as its factorization.

1343686987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79040428.

The product of its digits is 5225472, while the sum is 55.

The square root of 1343686987 is about 36656.3362462753. The cubic root of 1343686987 is about 1103.4839913676.

The spelling of 1343686987 in words is "one billion, three hundred forty-three million, six hundred eighty-six thousand, nine hundred eighty-seven".