1395556939 has 16 divisors (see below), whose sum is σ = 1636936128. Its totient is φ = 1165012992.

The previous prime is 1395556933. The next prime is 1395556957. The reversal of 1395556939 is 9396555931.

It is a cyclic number.

It is not a de Polignac number, because 1395556939 - 2⁹ = 1395556427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1395556939.

It is not an unprimeable number, because it can be changed into a prime (1395556933) 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, 37099 + ... + 64555.

It is an arithmetic number, because the mean of its divisors is an integer number (102308508).

Almost surely, 2^1395556939 is an apocalyptic number.

1395556939 is a deficient number, since it is larger than the sum of its proper divisors (241379189).

1395556939 is a wasteful number, since it uses less digits than its factorization.

1395556939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27654.

The product of its digits is 4920750, while the sum is 55.

The square root of 1395556939 is about 37357.1537861224. The cubic root of 1395556939 is about 1117.5042586174.

The spelling of 1395556939 in words is "one billion, three hundred ninety-five million, five hundred fifty-six thousand, nine hundred thirty-nine".