872243461 has 2 divisors, whose sum is σ = 872243462. Its totient is φ = 872243460.

The previous prime is 872243443. The next prime is 872243473. The reversal of 872243461 is 164342278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518427361 + 353816100 = 22769^2 + 18810^2 .

It is a cyclic number.

It is not a de Polignac number, because 872243461 - 2²³ = 863854853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 872243461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872243401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436121730 + 436121731.

It is an arithmetic number, because the mean of its divisors is an integer number (436121731).

Almost surely, 2^872243461 is an apocalyptic number.

It is an amenable number.

872243461 is a deficient number, since it is larger than the sum of its proper divisors (1).

872243461 is an equidigital number, since it uses as much as digits as its factorization.

872243461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 37.

The square root of 872243461 is about 29533.7681476645. The cubic root of 872243461 is about 955.4601406386.

The spelling of 872243461 in words is "eight hundred seventy-two million, two hundred forty-three thousand, four hundred sixty-one".