872669261 has 2 divisors, whose sum is σ = 872669262. Its totient is φ = 872669260.

The previous prime is 872669249. The next prime is 872669293. The reversal of 872669261 is 162966278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 675688036 + 196981225 = 25994^2 + 14035^2 .

It is a cyclic number.

It is not a de Polignac number, because 872669261 - 2¹⁸ = 872407117 is a prime.

It is a super-2 number, since 2×872669261² = 1523103278188572242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872669201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436334630 + 436334631.

It is an arithmetic number, because the mean of its divisors is an integer number (436334631).

Almost surely, 2^872669261 is an apocalyptic number.

It is an amenable number.

872669261 is a deficient number, since it is larger than the sum of its proper divisors (1).

872669261 is an equidigital number, since it uses as much as digits as its factorization.

872669261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 872669261 is about 29540.9759655973. The cubic root of 872669261 is about 955.6155898769.

The spelling of 872669261 in words is "eight hundred seventy-two million, six hundred sixty-nine thousand, two hundred sixty-one".