84210157 has 2 divisors, whose sum is σ = 84210158. Its totient is φ = 84210156.

The previous prime is 84210127. The next prime is 84210173. The reversal of 84210157 is 75101248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47073321 + 37136836 = 6861^2 + 6094^2 .

It is a cyclic number.

It is not a de Polignac number, because 84210157 - 2⁷ = 84210029 is a prime.

It is equal to p_4900519 and since 84210157 and 4900519 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84210127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42105078 + 42105079.

It is an arithmetic number, because the mean of its divisors is an integer number (42105079).

Almost surely, 2^84210157 is an apocalyptic number.

It is an amenable number.

84210157 is a deficient number, since it is larger than the sum of its proper divisors (1).

84210157 is an equidigital number, since it uses as much as digits as its factorization.

84210157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 84210157 is about 9176.6092321729. The cubic root of 84210157 is about 438.3168426026.

The spelling of 84210157 in words is "eighty-four million, two hundred ten thousand, one hundred fifty-seven".