1395947479 has 4 divisors (see below), whose sum is σ = 1416782584. Its totient is φ = 1375112376.

The previous prime is 1395947473. The next prime is 1395947513. The reversal of 1395947479 is 9747495931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1395947479 - 2¹¹ = 1395945431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395947473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10417452 + ... + 10417585.

It is an arithmetic number, because the mean of its divisors is an integer number (354195646).

Almost surely, 2^1395947479 is an apocalyptic number.

1395947479 is a deficient number, since it is larger than the sum of its proper divisors (20835105).

1395947479 is an equidigital number, since it uses as much as digits as its factorization.

1395947479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20835104.

The product of its digits is 8573040, while the sum is 58.

The square root of 1395947479 is about 37362.3805317595. The cubic root of 1395947479 is about 1117.6084916531.

The spelling of 1395947479 in words is "one billion, three hundred ninety-five million, nine hundred forty-seven thousand, four hundred seventy-nine".