1394223421 has 2 divisors, whose sum is σ = 1394223422. Its totient is φ = 1394223420.

The previous prime is 1394223403. The next prime is 1394223427. The reversal of 1394223421 is 1243224931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1394200921 + 22500 = 37339^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394223421 - 2¹⁵ = 1394190653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1394223427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697111710 + 697111711.

It is an arithmetic number, because the mean of its divisors is an integer number (697111711).

Almost surely, 2^1394223421 is an apocalyptic number.

It is an amenable number.

1394223421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394223421 is an equidigital number, since it uses as much as digits as its factorization.

1394223421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 1394223421 is about 37339.3012923381. The cubic root of 1394223421 is about 1117.1482031700.

The spelling of 1394223421 in words is "one billion, three hundred ninety-four million, two hundred twenty-three thousand, four hundred twenty-one".