1395698977 has 4 divisors (see below), whose sum is σ = 1395787540. Its totient is φ = 1395610416.

The previous prime is 1395698959. The next prime is 1395699001. The reversal of 1395698977 is 7798965931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 282542481 + 1113156496 = 16809^2 + 33364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1395698977 - 2²³ = 1387310369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1395668977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13518 + ... + 54535.

It is an arithmetic number, because the mean of its divisors is an integer number (348946885).

Almost surely, 2^1395698977 is an apocalyptic number.

It is an amenable number.

1395698977 is a deficient number, since it is larger than the sum of its proper divisors (88563).

1395698977 is an equidigital number, since it uses as much as digits as its factorization.

1395698977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88562.

The product of its digits is 25719120, while the sum is 64.

The square root of 1395698977 is about 37359.0548194143. The cubic root of 1395698977 is about 1117.5421700492.

The spelling of 1395698977 in words is "one billion, three hundred ninety-five million, six hundred ninety-eight thousand, nine hundred seventy-seven".