1338107987 has 4 divisors (see below), whose sum is σ = 1358079816. Its totient is φ = 1318136160.

The previous prime is 1338107977. The next prime is 1338108011. The reversal of 1338107987 is 7897018331.

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 1338107987 - 2⁴ = 1338107971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1338107977) 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, 9985814 + ... + 9985947.

It is an arithmetic number, because the mean of its divisors is an integer number (339519954).

Almost surely, 2^1338107987 is an apocalyptic number.

1338107987 is a deficient number, since it is larger than the sum of its proper divisors (19971829).

1338107987 is an equidigital number, since it uses as much as digits as its factorization.

1338107987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19971828.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 1338107987 is about 36580.1583785527. The cubic root of 1338107987 is about 1101.9546477669.

The spelling of 1338107987 in words is "one billion, three hundred thirty-eight million, one hundred seven thousand, nine hundred eighty-seven".