1390923241 has 2 divisors, whose sum is σ = 1390923242. Its totient is φ = 1390923240.

The previous prime is 1390923223. The next prime is 1390923251. The reversal of 1390923241 is 1423290931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 762919641 + 628003600 = 27621^2 + 25060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390923241 - 2⁷ = 1390923113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1390923197 and 1390923206.

It is not a weakly prime, because it can be changed into another prime (1390923211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695461620 + 695461621.

It is an arithmetic number, because the mean of its divisors is an integer number (695461621).

Almost surely, 2^1390923241 is an apocalyptic number.

It is an amenable number.

1390923241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390923241 is an equidigital number, since it uses as much as digits as its factorization.

1390923241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1390923241 is about 37295.0833354747. The cubic root of 1390923241 is about 1116.2660626519.

The spelling of 1390923241 in words is "one billion, three hundred ninety million, nine hundred twenty-three thousand, two hundred forty-one".