1376135905 has 16 divisors (see below), whose sum is σ = 1681838784. Its totient is φ = 1080665280.

The previous prime is 1376135903. The next prime is 1376135953. The reversal of 1376135905 is 5095316731.

It is a happy number.

It is not a de Polignac number, because 1376135905 - 2¹ = 1376135903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1376135903) 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, 155202 + ... + 163828.

It is an arithmetic number, because the mean of its divisors is an integer number (105114924).

Almost surely, 2^1376135905 is an apocalyptic number.

It is an amenable number.

1376135905 is a deficient number, since it is larger than the sum of its proper divisors (305702879).

1376135905 is an equidigital number, since it uses as much as digits as its factorization.

1376135905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9216.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 1376135905 is about 37096.3058133826. The cubic root of 1376135905 is about 1112.2961707118.

The spelling of 1376135905 in words is "one billion, three hundred seventy-six million, one hundred thirty-five thousand, nine hundred five".