74729791 has 2 divisors, whose sum is σ = 74729792. Its totient is φ = 74729790.

The previous prime is 74729777. The next prime is 74729827. The reversal of 74729791 is 19792747.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74729791 - 2⁹ = 74729279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74729731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37364895 + 37364896.

It is an arithmetic number, because the mean of its divisors is an integer number (37364896).

Almost surely, 2^74729791 is an apocalyptic number.

74729791 is a deficient number, since it is larger than the sum of its proper divisors (1).

74729791 is an equidigital number, since it uses as much as digits as its factorization.

74729791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 46.

The square root of 74729791 is about 8644.6394372466. The cubic root of 74729791 is about 421.2092718918.

The spelling of 74729791 in words is "seventy-four million, seven hundred twenty-nine thousand, seven hundred ninety-one".