1387307869 has 4 divisors (see below), whose sum is σ = 1387441440. Its totient is φ = 1387174300.

The previous prime is 1387307851. The next prime is 1387307903. The reversal of 1387307869 is 9687037831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1387307869 - 2⁹ = 1387307357 is a prime.

It is a super-2 number, since 2×1387307869² = 3849246246778642322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387307809) 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, 49759 + ... + 72460.

It is an arithmetic number, because the mean of its divisors is an integer number (346860360).

Almost surely, 2^1387307869 is an apocalyptic number.

It is an amenable number.

1387307869 is a deficient number, since it is larger than the sum of its proper divisors (133571).

1387307869 is a wasteful number, since it uses less digits than its factorization.

1387307869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133570.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 1387307869 is about 37246.5819774110. The cubic root of 1387307869 is about 1115.2980680055.

The spelling of 1387307869 in words is "one billion, three hundred eighty-seven million, three hundred seven thousand, eight hundred sixty-nine".