1387691534 has 16 divisors (see below), whose sum is σ = 2097813600. Its totient is φ = 688430880.

The previous prime is 1387691531. The next prime is 1387691537. The reversal of 1387691534 is 4351967831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1387691531) and next prime (1387691537).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387691531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349967 + ... + 353909.

It is an arithmetic number, because the mean of its divisors is an integer number (131113350).

Almost surely, 2^1387691534 is an apocalyptic number.

1387691534 is a deficient number, since it is larger than the sum of its proper divisors (710122066).

1387691534 is a wasteful number, since it uses less digits than its factorization.

1387691534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275.

The product of its digits is 544320, while the sum is 47.

The square root of 1387691534 is about 37251.7319597358. The cubic root of 1387691534 is about 1115.4008717650.

The spelling of 1387691534 in words is "one billion, three hundred eighty-seven million, six hundred ninety-one thousand, five hundred thirty-four".