1994412529 has 2 divisors, whose sum is σ = 1994412530. Its totient is φ = 1994412528.

The previous prime is 1994412479. The next prime is 1994412551. The reversal of 1994412529 is 9252144991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1966035600 + 28376929 = 44340^2 + 5327^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994412529 - 2⁷ = 1994412401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1994412599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997206264 + 997206265.

It is an arithmetic number, because the mean of its divisors is an integer number (997206265).

Almost surely, 2^1994412529 is an apocalyptic number.

It is an amenable number.

1994412529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994412529 is an equidigital number, since it uses as much as digits as its factorization.

1994412529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 1994412529 is about 44658.8460330090. The cubic root of 1994412529 is about 1258.7466601821.

The spelling of 1994412529 in words is "one billion, nine hundred ninety-four million, four hundred twelve thousand, five hundred twenty-nine".