1395299661 has 16 divisors (see below), whose sum is σ = 2129625600. Its totient is φ = 796018608.

The previous prime is 1395299641. The next prime is 1395299683. The reversal of 1395299661 is 1669925931.

It is not a de Polignac number, because 1395299661 - 2⁵ = 1395299629 is a prime.

It is a super-2 number, since 2×1395299661² = 3893722287973429842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395299611) 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, 40671 + ... + 66668.

It is an arithmetic number, because the mean of its divisors is an integer number (133101600).

Almost surely, 2^1395299661 is an apocalyptic number.

It is an amenable number.

1395299661 is a deficient number, since it is larger than the sum of its proper divisors (734325939).

1395299661 is a wasteful number, since it uses less digits than its factorization.

1395299661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107968.

The product of its digits is 787320, while the sum is 51.

The square root of 1395299661 is about 37353.7101370132. The cubic root of 1395299661 is about 1117.4355818709.

The spelling of 1395299661 in words is "one billion, three hundred ninety-five million, two hundred ninety-nine thousand, six hundred sixty-one".