1387354785 has 16 divisors (see below), whose sum is σ = 2350342656. Its totient is φ = 696397568.

The previous prime is 1387354783. The next prime is 1387354799. The reversal of 1387354785 is 5874537831.

It is a cyclic number.

It is not a de Polignac number, because 1387354785 - 2¹ = 1387354783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1387354783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2720049 + ... + 2720558.

It is an arithmetic number, because the mean of its divisors is an integer number (146896416).

Almost surely, 2^1387354785 is an apocalyptic number.

1387354785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1387354785 is a deficient number, since it is larger than the sum of its proper divisors (962987871).

1387354785 is a wasteful number, since it uses less digits than its factorization.

1387354785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440632.

The product of its digits is 2822400, while the sum is 51.

The square root of 1387354785 is about 37247.2117748430. The cubic root of 1387354785 is about 1115.3106402532.

The spelling of 1387354785 in words is "one billion, three hundred eighty-seven million, three hundred fifty-four thousand, seven hundred eighty-five".