8400079 has 2 divisors, whose sum is σ = 8400080. Its totient is φ = 8400078.

The previous prime is 8400061. The next prime is 8400097. The reversal of 8400079 is 9700048.

Together with next prime (8400097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (8400061) and next prime (8400097).

It is a cyclic number.

It is not a de Polignac number, because 8400079 - 2⁵ = 8400047 is a prime.

It is a super-2 number, since 2×8400079² = 141122654412482, which contains 22 as substring.

It is an Ulam number.

8400079 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8400019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200039 + 4200040.

It is an arithmetic number, because the mean of its divisors is an integer number (4200040).

Almost surely, 2^8400079 is an apocalyptic number.

8400079 is a deficient number, since it is larger than the sum of its proper divisors (1).

8400079 is an equidigital number, since it uses as much as digits as its factorization.

8400079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 8400079 is about 2898.2889780006. The cubic root of 8400079 is about 203.2799086254.

The spelling of 8400079 in words is "eight million, four hundred thousand, seventy-nine".