74353991 has 2 divisors, whose sum is σ = 74353992. Its totient is φ = 74353990.

The previous prime is 74353943. The next prime is 74354003. The reversal of 74353991 is 19935347.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74353991 - 2¹⁴ = 74337607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74353901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37176995 + 37176996.

It is an arithmetic number, because the mean of its divisors is an integer number (37176996).

Almost surely, 2^74353991 is an apocalyptic number.

74353991 is a deficient number, since it is larger than the sum of its proper divisors (1).

74353991 is an equidigital number, since it uses as much as digits as its factorization.

74353991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 41.

The square root of 74353991 is about 8622.8760283330. The cubic root of 74353991 is about 420.5020281799.

The spelling of 74353991 in words is "seventy-four million, three hundred fifty-three thousand, nine hundred ninety-one".