22391429 has 2 divisors, whose sum is σ = 22391430. Its totient is φ = 22391428.

The previous prime is 22391407. The next prime is 22391471. The reversal of 22391429 is 92419322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21436900 + 954529 = 4630^2 + 977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22391429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22391395 and 22391404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22301429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11195714 + 11195715.

It is an arithmetic number, because the mean of its divisors is an integer number (11195715).

Almost surely, 2^22391429 is an apocalyptic number.

It is an amenable number.

22391429 is a deficient number, since it is larger than the sum of its proper divisors (1).

22391429 is an equidigital number, since it uses as much as digits as its factorization.

22391429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 22391429 is about 4731.9582627069. The cubic root of 22391429 is about 281.8559908879.

The spelling of 22391429 in words is "twenty-two million, three hundred ninety-one thousand, four hundred twenty-nine".