84649399 has 2 divisors, whose sum is σ = 84649400. Its totient is φ = 84649398.

The previous prime is 84649393. The next prime is 84649421. The reversal of 84649399 is 99394648.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84649399 - 2³ = 84649391 is a prime.

It is a super-2 number, since 2×84649399² = 14331041502122402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84649391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42324699 + 42324700.

It is an arithmetic number, because the mean of its divisors is an integer number (42324700).

Almost surely, 2^84649399 is an apocalyptic number.

84649399 is a deficient number, since it is larger than the sum of its proper divisors (1).

84649399 is an equidigital number, since it uses as much as digits as its factorization.

84649399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 52.

The square root of 84649399 is about 9200.5108010371. The cubic root of 84649399 is about 439.0776114461.

The spelling of 84649399 in words is "eighty-four million, six hundred forty-nine thousand, three hundred ninety-nine".