1395749971 has 16 divisors (see below), whose sum is σ = 1744577280. Its totient is φ = 1084834080.

The previous prime is 1395749951. The next prime is 1395749977. The reversal of 1395749971 is 1799475931.

It is not a de Polignac number, because 1395749971 - 2¹⁷ = 1395618899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1395749977) 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, 7740 + ... + 53398.

It is an arithmetic number, because the mean of its divisors is an integer number (109036080).

Almost surely, 2^1395749971 is an apocalyptic number.

1395749971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1395749971 is a deficient number, since it is larger than the sum of its proper divisors (348827309).

1395749971 is a wasteful number, since it uses less digits than its factorization.

1395749971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46074.

The product of its digits is 2143260, while the sum is 55.

The square root of 1395749971 is about 37359.7372983269. The cubic root of 1395749971 is about 1117.5557802551. Note that the first 3 decimals are identical.

The spelling of 1395749971 in words is "one billion, three hundred ninety-five million, seven hundred forty-nine thousand, nine hundred seventy-one".