872543761 has 2 divisors, whose sum is σ = 872543762. Its totient is φ = 872543760.

The previous prime is 872543753. The next prime is 872543773. The reversal of 872543761 is 167345278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 796086225 + 76457536 = 28215^2 + 8744^2 .

It is a cyclic number.

It is not a de Polignac number, because 872543761 - 2³ = 872543753 is a prime.

It is a super-2 number, since 2×872543761² = 1522665229720050242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (872540761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436271880 + 436271881.

It is an arithmetic number, because the mean of its divisors is an integer number (436271881).

Almost surely, 2^872543761 is an apocalyptic number.

It is an amenable number.

872543761 is a deficient number, since it is larger than the sum of its proper divisors (1).

872543761 is an equidigital number, since it uses as much as digits as its factorization.

872543761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 43.

The square root of 872543761 is about 29538.8517210808. The cubic root of 872543761 is about 955.5697781315.

The spelling of 872543761 in words is "eight hundred seventy-two million, five hundred forty-three thousand, seven hundred sixty-one".