1393613987 has 8 divisors (see below), whose sum is σ = 1404804240. Its totient is φ = 1382461920.

The previous prime is 1393613983. The next prime is 1393613993. The reversal of 1393613987 is 7893163931.

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 1393613987 - 2² = 1393613983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1393613983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66113 + ... + 84605.

It is an arithmetic number, because the mean of its divisors is an integer number (175600530).

Almost surely, 2^1393613987 is an apocalyptic number.

1393613987 is a deficient number, since it is larger than the sum of its proper divisors (11190253).

1393613987 is a wasteful number, since it uses less digits than its factorization.

1393613987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19093.

The product of its digits is 734832, while the sum is 50.

The square root of 1393613987 is about 37331.1396423951. The cubic root of 1393613987 is about 1116.9854058948.

The spelling of 1393613987 in words is "one billion, three hundred ninety-three million, six hundred thirteen thousand, nine hundred eighty-seven".