1387249366 has 4 divisors (see below), whose sum is σ = 2080874052. Its totient is φ = 693624682.

The previous prime is 1387249361. The next prime is 1387249403. The reversal of 1387249366 is 6639427831.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387249361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346812340 + ... + 346812343.

It is an arithmetic number, because the mean of its divisors is an integer number (520218513).

Almost surely, 2^1387249366 is an apocalyptic number.

1387249366 is a deficient number, since it is larger than the sum of its proper divisors (693624686).

1387249366 is an equidigital number, since it uses as much as digits as its factorization.

1387249366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693624685.

The product of its digits is 1306368, while the sum is 49.

The square root of 1387249366 is about 37245.7966219008. The cubic root of 1387249366 is about 1115.2823903511.

The spelling of 1387249366 in words is "one billion, three hundred eighty-seven million, two hundred forty-nine thousand, three hundred sixty-six".