84156929 has 2 divisors, whose sum is σ = 84156930. Its totient is φ = 84156928.

The previous prime is 84156893. The next prime is 84156967. The reversal of 84156929 is 92965148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42876304 + 41280625 = 6548^2 + 6425^2 .

It is a cyclic number.

It is not a de Polignac number, because 84156929 - 2⁸ = 84156673 is a prime.

It is a super-2 number, since 2×84156929² = 14164777397422082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84156929.

It is not a weakly prime, because it can be changed into another prime (84156979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42078464 + 42078465.

It is an arithmetic number, because the mean of its divisors is an integer number (42078465).

Almost surely, 2^84156929 is an apocalyptic number.

It is an amenable number.

84156929 is a deficient number, since it is larger than the sum of its proper divisors (1).

84156929 is an equidigital number, since it uses as much as digits as its factorization.

84156929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 84156929 is about 9173.7085739629. The cubic root of 84156929 is about 438.2244719309.

The spelling of 84156929 in words is "eighty-four million, one hundred fifty-six thousand, nine hundred twenty-nine".