84399645 has 32 divisors (see below), whose sum is σ = 155986560. Its totient is φ = 38512640.

The previous prime is 84399641. The next prime is 84399649. The reversal of 84399645 is 54699348.

It is an interprime number because it is at equal distance from previous prime (84399641) and next prime (84399649).

It is not a de Polignac number, because 84399645 - 2² = 84399641 is a prime.

It is a super-2 number, since 2×84399645² = 14246600152252050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84399594 and 84399603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84399641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12240 + ... + 17849.

It is an arithmetic number, because the mean of its divisors is an integer number (4874580).

Almost surely, 2^84399645 is an apocalyptic number.

84399645 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

84399645 is a deficient number, since it is larger than the sum of its proper divisors (71586915).

84399645 is a wasteful number, since it uses less digits than its factorization.

84399645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30125.

The product of its digits is 933120, while the sum is 48.

The square root of 84399645 is about 9186.9279413741. The cubic root of 84399645 is about 438.6453602295.

The spelling of 84399645 in words is "eighty-four million, three hundred ninety-nine thousand, six hundred forty-five".