1023399 has 12 divisors (see below), whose sum is σ = 1592136. Its totient is φ = 629712.

The previous prime is 1023391. The next prime is 1023409. The reversal of 1023399 is 9933201.

It is not a de Polignac number, because 1023399 - 2³ = 1023391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4257 + ... + 4490.

It is an arithmetic number, because the mean of its divisors is an integer number (132678).

2^1023399 is an apocalyptic number.

1023399 is a deficient number, since it is larger than the sum of its proper divisors (568737).

1023399 is a wasteful number, since it uses less digits than its factorization.

1023399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8766 (or 8763 counting only the distinct ones).

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

The square root of 1023399 is about 1011.6318500324. The cubic root of 1023399 is about 100.7739610557.

It can be divided in two parts, 10 and 23399, that added together give a square (23409 = 153²).

The spelling of 1023399 in words is "one million, twenty-three thousand, three hundred ninety-nine".