872150861 has 2 divisors, whose sum is σ = 872150862. Its totient is φ = 872150860.

The previous prime is 872150827. The next prime is 872150887. The reversal of 872150861 is 168051278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 845006761 + 27144100 = 29069^2 + 5210^2 .

It is a cyclic number.

It is not a de Polignac number, because 872150861 - 2¹⁴ = 872134477 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 (872150801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436075430 + 436075431.

It is an arithmetic number, because the mean of its divisors is an integer number (436075431).

Almost surely, 2^872150861 is an apocalyptic number.

It is an amenable number.

872150861 is a deficient number, since it is larger than the sum of its proper divisors (1).

872150861 is an equidigital number, since it uses as much as digits as its factorization.

872150861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 872150861 is about 29532.2004090450. The cubic root of 872150861 is about 955.4263279307.

The spelling of 872150861 in words is "eight hundred seventy-two million, one hundred fifty thousand, eight hundred sixty-one".