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390007 = 675821
BaseRepresentation
bin1011111001101110111
3201210222201
41133031313
544440012
612205331
73213022
oct1371567
9653881
10390007
11247022
12169847
13108697
14a21b9
157a857
hex5f377

390007 has 4 divisors (see below), whose sum is σ = 395896. Its totient is φ = 384120.

The previous prime is 390001. The next prime is 390043. The reversal of 390007 is 700093.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700093 = 1936847.

It is a cyclic number.

It is not a de Polignac number, because 390007 - 23 = 389999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2844 + ... + 2977.

It is an arithmetic number, because the mean of its divisors is an integer number (98974).

2390007 is an apocalyptic number.

390007 is a deficient number, since it is larger than the sum of its proper divisors (5889).

390007 is an equidigital number, since it uses as much as digits as its factorization.

390007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888.

The product of its (nonzero) digits is 189, while the sum is 19.

The square root of 390007 is about 624.5054043001. The cubic root of 390007 is about 73.0618728577.

The spelling of 390007 in words is "three hundred ninety thousand, seven".

Divisors: 1 67 5821 390007