1386623961 has 8 divisors (see below), whose sum is σ = 2054257760. Its totient is φ = 924415956.

The previous prime is 1386623923. The next prime is 1386623969. The reversal of 1386623961 is 1693266831.

1386623961 is a `hidden beast` number, since 13 + 8 + 6 + 623 + 9 + 6 + 1 = 666.

It is not a de Polignac number, because 1386623961 - 2⁹ = 1386623449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386623969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25678195 + ... + 25678248.

It is an arithmetic number, because the mean of its divisors is an integer number (256782220).

Almost surely, 2^1386623961 is an apocalyptic number.

It is an amenable number.

1386623961 is a deficient number, since it is larger than the sum of its proper divisors (667633799).

1386623961 is an equidigital number, since it uses as much as digits as its factorization.

1386623961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51356452 (or 51356446 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1386623961 is about 37237.4000300773. The cubic root of 1386623961 is about 1115.1147665521.

The spelling of 1386623961 in words is "one billion, three hundred eighty-six million, six hundred twenty-three thousand, nine hundred sixty-one".