1390923 has 12 divisors (see below), whose sum is σ = 2127528. Its totient is φ = 872640.

The previous prime is 1390919. The next prime is 1390931. The reversal of 1390923 is 3290931.

It is not a de Polignac number, because 1390923 - 2² = 1390919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1390903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4393 + ... + 4698.

It is an arithmetic number, because the mean of its divisors is an integer number (177294).

2^1390923 is an apocalyptic number.

1390923 is a deficient number, since it is larger than the sum of its proper divisors (736605).

1390923 is a wasteful number, since it uses less digits than its factorization.

1390923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114 (or 9111 counting only the distinct ones).

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

The square root of 1390923 is about 1179.3739864861. The cubic root of 1390923 is about 111.6265998181.

The spelling of 1390923 in words is "one million, three hundred ninety thousand, nine hundred twenty-three".