872379617 has 2 divisors, whose sum is σ = 872379618. Its totient is φ = 872379616.

The previous prime is 872379601. The next prime is 872379671. The reversal of 872379617 is 716973278.

Together with next prime (872379671) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544008976 + 328370641 = 23324^2 + 18121^2 .

It is a cyclic number.

It is not a de Polignac number, because 872379617 - 2⁴ = 872379601 is a prime.

It is a super-2 number, since 2×872379617² = 1522092392314133378, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (872379317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436189808 + 436189809.

It is an arithmetic number, because the mean of its divisors is an integer number (436189809).

Almost surely, 2^872379617 is an apocalyptic number.

It is an amenable number.

872379617 is a deficient number, since it is larger than the sum of its proper divisors (1).

872379617 is an equidigital number, since it uses as much as digits as its factorization.

872379617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 50.

The square root of 872379617 is about 29536.0731479322. The cubic root of 872379617 is about 955.5098533883.

The spelling of 872379617 in words is "eight hundred seventy-two million, three hundred seventy-nine thousand, six hundred seventeen".