1375278905 has 96 divisors (see below), whose sum is σ = 2327408640. Its totient is φ = 756138240.

The previous prime is 1375278889. The next prime is 1375278907. The reversal of 1375278905 is 5098725731.

It is not a de Polignac number, because 1375278905 - 2⁴ = 1375278889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1375278905.

It is not an unprimeable number, because it can be changed into a prime (1375278907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1496036 + ... + 1496954.

It is an arithmetic number, because the mean of its divisors is an integer number (24243840).

Almost surely, 2^1375278905 is an apocalyptic number.

It is an amenable number.

1375278905 is a deficient number, since it is larger than the sum of its proper divisors (952129735).

1375278905 is a wasteful number, since it uses less digits than its factorization.

1375278905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 1375278905 is about 37084.7529990426. The cubic root of 1375278905 is about 1112.0652255553.

The spelling of 1375278905 in words is "one billion, three hundred seventy-five million, two hundred seventy-eight thousand, nine hundred five".