1399623 has 8 divisors (see below), whose sum is σ = 1892736. Its totient is φ = 919800.

The previous prime is 1399621. The next prime is 1399633. The reversal of 1399623 is 3269931.

1399623 = T₁₆₂ + T₁₆₃ + ... + T₂₃₂.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1399623 - 2¹ = 1399621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3073 + ... + 3498.

It is an arithmetic number, because the mean of its divisors is an integer number (236592).

2^1399623 is an apocalyptic number.

1399623 is a deficient number, since it is larger than the sum of its proper divisors (493113).

1399623 is an equidigital number, since it uses as much as digits as its factorization.

1399623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645.

The product of its digits is 8748, while the sum is 33.

The square root of 1399623 is about 1183.0566343164. The cubic root of 1399623 is about 111.8588517416.

The spelling of 1399623 in words is "one million, three hundred ninety-nine thousand, six hundred twenty-three".