1375221799 has 16 divisors (see below), whose sum is σ = 1607112000. Its totient is φ = 1176296352.

The previous prime is 1375221781. The next prime is 1375221823. The reversal of 1375221799 is 9971225731.

It is not a de Polignac number, because 1375221799 - 2²¹ = 1373124647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375225799) 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, 170649 + ... + 178525.

It is an arithmetic number, because the mean of its divisors is an integer number (100444500).

Almost surely, 2^1375221799 is an apocalyptic number.

1375221799 is a deficient number, since it is larger than the sum of its proper divisors (231890201).

1375221799 is an frugal number, since it uses more digits than its factorization.

1375221799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8407 (or 8393 counting only the distinct ones).

The product of its digits is 238140, while the sum is 46.

The square root of 1375221799 is about 37083.9830519862. The cubic root of 1375221799 is about 1112.0498331682.

The spelling of 1375221799 in words is "one billion, three hundred seventy-five million, two hundred twenty-one thousand, seven hundred ninety-nine".