84261031 has 4 divisors (see below), whose sum is σ = 84331152. Its totient is φ = 84190912.

The previous prime is 84261013. The next prime is 84261059. The reversal of 84261031 is 13016248.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84261031 - 2⁵ = 84260999 is a prime.

It is a super-2 number, since 2×84261031² = 14199842690365922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84260987 and 84261005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84261011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33226 + ... + 35671.

It is an arithmetic number, because the mean of its divisors is an integer number (21082788).

Almost surely, 2^84261031 is an apocalyptic number.

84261031 is a deficient number, since it is larger than the sum of its proper divisors (70121).

84261031 is a wasteful number, since it uses less digits than its factorization.

84261031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70120.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 84261031 is about 9179.3807525345. The cubic root of 84261031 is about 438.4050918228.

Adding to 84261031 its reverse (13016248), we get a palindrome (97277279).

The spelling of 84261031 in words is "eighty-four million, two hundred sixty-one thousand, thirty-one".