872003261 has 2 divisors, whose sum is σ = 872003262. Its totient is φ = 872003260.

The previous prime is 872003243. The next prime is 872003273. The reversal of 872003261 is 162300278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863772100 + 8231161 = 29390^2 + 2869^2 .

It is a cyclic number.

It is not a de Polignac number, because 872003261 - 2²² = 867808957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872003201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436001630 + 436001631.

It is an arithmetic number, because the mean of its divisors is an integer number (436001631).

Almost surely, 2^872003261 is an apocalyptic number.

It is an amenable number.

872003261 is a deficient number, since it is larger than the sum of its proper divisors (1).

872003261 is an equidigital number, since it uses as much as digits as its factorization.

872003261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 872003261 is about 29529.7013361124. The cubic root of 872003261 is about 955.3724271327.

The spelling of 872003261 in words is "eight hundred seventy-two million, three thousand, two hundred sixty-one".