84238677121 has 9 divisors (see below), whose sum is σ = 86355590083. Its totient is φ = 82172465680.

The previous prime is 84238677097. The next prime is 84238677251. The reversal of 84238677121 is 12177683248.

The square root of 84238677121 is 290239.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4059091521 + 80179585600 = 63711^2 + 283160^2 .

It is not a de Polignac number, because 84238677121 - 2⁹ = 84238676609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84238675121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11896260 + ... + 11903338.

Almost surely, 2^84238677121 is an apocalyptic number.

84238677121 is the 290239-th square number.

84238677121 is the 145120-th centered octagonal number.

It is an amenable number.

84238677121 is a deficient number, since it is larger than the sum of its proper divisors (2116912962).

84238677121 is an frugal number, since it uses more digits than its factorization.

84238677121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14240 (or 7120 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

Multiplying 84238677121 by its sum of digits (49), we get a square (4127695178929 = 2031673²).

The spelling of 84238677121 in words is "eighty-four billion, two hundred thirty-eight million, six hundred seventy-seven thousand, one hundred twenty-one".