1390933 has 6 divisors (see below), whose sum is σ = 1468374. Its totient is φ = 1317384.

The previous prime is 1390931. The next prime is 1390937. The reversal of 1390933 is 3390931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1387684 + 3249 = 1178^2 + 57^2 .

It is not a de Polignac number, because 1390933 - 2¹ = 1390931 is a prime.

It is a super-2 number, since 2×1390933² = 3869389220978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390931) 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 5 ways as a sum of consecutive naturals, for example, 1566 + ... + 2287.

It is an arithmetic number, because the mean of its divisors is an integer number (244729).

2^1390933 is an apocalyptic number.

It is an amenable number.

1390933 is a deficient number, since it is larger than the sum of its proper divisors (77441).

1390933 is an equidigital number, since it uses as much as digits as its factorization.

1390933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 1390933 is about 1179.3782260157. The cubic root of 1390933 is about 111.6268673296.

The spelling of 1390933 in words is "one million, three hundred ninety thousand, nine hundred thirty-three".