1393974887 has 8 divisors (see below), whose sum is σ = 1421269200. Its totient is φ = 1366802944.

The previous prime is 1393974821. The next prime is 1393974899. The reversal of 1393974887 is 7884793931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1393974887 - 2¹⁰ = 1393973863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393974287) 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, 7418 + ... + 53319.

It is an arithmetic number, because the mean of its divisors is an integer number (177658650).

Almost surely, 2^1393974887 is an apocalyptic number.

1393974887 is a deficient number, since it is larger than the sum of its proper divisors (27294313).

1393974887 is an equidigital number, since it uses as much as digits as its factorization.

1393974887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61185.

The product of its digits is 9144576, while the sum is 59.

The square root of 1393974887 is about 37335.9730956620. The cubic root of 1393974887 is about 1117.0818183503.

The spelling of 1393974887 in words is "one billion, three hundred ninety-three million, nine hundred seventy-four thousand, eight hundred eighty-seven".