1395731573 has 4 divisors (see below), whose sum is σ = 1395866400. Its totient is φ = 1395596748.

The previous prime is 1395731549. The next prime is 1395731581. The reversal of 1395731573 is 3751375931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1395731573 - 2¹⁶ = 1395666037 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 (1395731503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50465 + ... + 73062.

It is an arithmetic number, because the mean of its divisors is an integer number (348966600).

Almost surely, 2^1395731573 is an apocalyptic number.

It is an amenable number.

1395731573 is a deficient number, since it is larger than the sum of its proper divisors (134827).

1395731573 is a wasteful number, since it uses less digits than its factorization.

1395731573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134826.

The product of its digits is 297675, while the sum is 44.

The square root of 1395731573 is about 37359.4910698741. The cubic root of 1395731573 is about 1117.5508699006.

The spelling of 1395731573 in words is "one billion, three hundred ninety-five million, seven hundred thirty-one thousand, five hundred seventy-three".