84400037 has 2 divisors, whose sum is σ = 84400038. Its totient is φ = 84400036.

The previous prime is 84400021. The next prime is 84400049. The reversal of 84400037 is 73000448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84070561 + 329476 = 9169^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 84400037 - 2⁴ = 84400021 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84399979 and 84400015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84400067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42200018 + 42200019.

It is an arithmetic number, because the mean of its divisors is an integer number (42200019).

Almost surely, 2^84400037 is an apocalyptic number.

It is an amenable number.

84400037 is a deficient number, since it is larger than the sum of its proper divisors (1).

84400037 is an equidigital number, since it uses as much as digits as its factorization.

84400037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 84400037 is about 9186.9492760111. The cubic root of 84400037 is about 438.6460393347.

The spelling of 84400037 in words is "eighty-four million, four hundred thousand, thirty-seven".