1522729447 has 2 divisors, whose sum is σ = 1522729448. Its totient is φ = 1522729446.

The previous prime is 1522729433. The next prime is 1522729501. The reversal of 1522729447 is 7449272251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1522729447 - 2⁷ = 1522729319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1522739447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761364723 + 761364724.

It is an arithmetic number, because the mean of its divisors is an integer number (761364724).

Almost surely, 2^1522729447 is an apocalyptic number.

1522729447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522729447 is an equidigital number, since it uses as much as digits as its factorization.

1522729447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 43.

The square root of 1522729447 is about 39022.1660982575. The cubic root of 1522729447 is about 1150.4672196051.

The spelling of 1522729447 in words is "one billion, five hundred twenty-two million, seven hundred twenty-nine thousand, four hundred forty-seven".