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30699 = 34379
BaseRepresentation
bin111011111101011
31120010000
413133223
51440244
6354043
7155334
oct73753
946100
1030699
1121079
1215923
1310c86
14b28b
159169
hex77eb

30699 has 10 divisors (see below), whose sum is σ = 45980. Its totient is φ = 20412.

The previous prime is 30697. The next prime is 30703. The reversal of 30699 is 99603.

Subtracting from 30699 its product of nonzero digits (1458), we obtain a square (29241 = 1712).

It can be divided in two parts, 30 and 699, that added together give a 6-th power (729 = 36).

It is not a de Polignac number, because 30699 - 21 = 30697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 30699.

It is not an unprimeable number, because it can be changed into a prime (30697) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 109 + ... + 270.

It is an arithmetic number, because the mean of its divisors is an integer number (4598).

230699 is an apocalyptic number.

30699 is a deficient number, since it is larger than the sum of its proper divisors (15281).

30699 is an equidigital number, since it uses as much as digits as its factorization.

30699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 30699 is about 175.2113010054. The cubic root of 30699 is about 31.3118030251.

The spelling of 30699 in words is "thirty thousand, six hundred ninety-nine".

Divisors: 1 3 9 27 81 379 1137 3411 10233 30699