78743629 has 2 divisors, whose sum is σ = 78743630. Its totient is φ = 78743628.

The previous prime is 78743611. The next prime is 78743633. The reversal of 78743629 is 92634787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73925604 + 4818025 = 8598^2 + 2195^2 .

It is a cyclic number.

It is not a de Polignac number, because 78743629 - 2⁷ = 78743501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78743699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39371814 + 39371815.

It is an arithmetic number, because the mean of its divisors is an integer number (39371815).

Almost surely, 2^78743629 is an apocalyptic number.

It is an amenable number.

78743629 is a deficient number, since it is larger than the sum of its proper divisors (1).

78743629 is an equidigital number, since it uses as much as digits as its factorization.

78743629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 78743629 is about 8873.7607022051. The cubic root of 78743629 is about 428.6193848294.

The spelling of 78743629 in words is "seventy-eight million, seven hundred forty-three thousand, six hundred twenty-nine".