74902643 has 2 divisors, whose sum is σ = 74902644. Its totient is φ = 74902642.

The previous prime is 74902609. The next prime is 74902691. The reversal of 74902643 is 34620947.

It is a weak prime.

It is an emirp because it is prime and its reverse (34620947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74902643 - 2¹⁸ = 74640499 is a prime.

It is a super-2 number, since 2×74902643² = 11220811856770898, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (74902043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37451321 + 37451322.

It is an arithmetic number, because the mean of its divisors is an integer number (37451322).

Almost surely, 2^74902643 is an apocalyptic number.

74902643 is a deficient number, since it is larger than the sum of its proper divisors (1).

74902643 is an equidigital number, since it uses as much as digits as its factorization.

74902643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 74902643 is about 8654.6313035276. The cubic root of 74902643 is about 421.5337779171.

The spelling of 74902643 in words is "seventy-four million, nine hundred two thousand, six hundred forty-three".