74988647 has 2 divisors, whose sum is σ = 74988648. Its totient is φ = 74988646.

The previous prime is 74988629. The next prime is 74988653. The reversal of 74988647 is 74688947.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74988647 - 2¹⁶ = 74923111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74982647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37494323 + 37494324.

It is an arithmetic number, because the mean of its divisors is an integer number (37494324).

Almost surely, 2^74988647 is an apocalyptic number.

74988647 is a deficient number, since it is larger than the sum of its proper divisors (1).

74988647 is an equidigital number, since it uses as much as digits as its factorization.

74988647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 53.

The square root of 74988647 is about 8659.5985472769. The cubic root of 74988647 is about 421.6950527081.

The spelling of 74988647 in words is "seventy-four million, nine hundred eighty-eight thousand, six hundred forty-seven".