1375801989 has 16 divisors (see below), whose sum is σ = 1942809600. Its totient is φ = 863590896.

The previous prime is 1375801981. The next prime is 1375802009. The reversal of 1375801989 is 9891085731.

It is not a de Polignac number, because 1375801989 - 2³ = 1375801981 is a prime.

It is a super-2 number, since 2×1375801989² = 3785662225872712242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375801981) 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, 64749 + ... + 83330.

It is an arithmetic number, because the mean of its divisors is an integer number (121425600).

Almost surely, 2^1375801989 is an apocalyptic number.

1375801989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1375801989 is a deficient number, since it is larger than the sum of its proper divisors (567007611).

1375801989 is a wasteful number, since it uses less digits than its factorization.

1375801989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148264.

The product of its (nonzero) digits is 544320, while the sum is 51.

The square root of 1375801989 is about 37091.8048765492. The cubic root of 1375801989 is about 1112.2061981222.

The spelling of 1375801989 in words is "one billion, three hundred seventy-five million, eight hundred one thousand, nine hundred eighty-nine".