1072871989 has 16 divisors (see below), whose sum is σ = 1320278400. Its totient is φ = 850834944.

The previous prime is 1072871977. The next prime is 1072872011. The reversal of 1072871989 is 9891782701.

It is a cyclic number.

It is not a de Polignac number, because 1072871989 - 2²⁷ = 938654261 is a prime.

It is a super-2 number, since 2×1072871989² = 2302108609561632242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072871959) 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, 69384 + ... + 83425.

It is an arithmetic number, because the mean of its divisors is an integer number (82517400).

Almost surely, 2^1072871989 is an apocalyptic number.

It is an amenable number.

1072871989 is a deficient number, since it is larger than the sum of its proper divisors (247406411).

1072871989 is a wasteful number, since it uses less digits than its factorization.

1072871989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152892.

The product of its (nonzero) digits is 508032, while the sum is 52.

The square root of 1072871989 is about 32754.7246820974. The cubic root of 1072871989 is about 1023.7234121992.

The spelling of 1072871989 in words is "one billion, seventy-two million, eight hundred seventy-one thousand, nine hundred eighty-nine".