74747473 has 2 divisors, whose sum is σ = 74747474. Its totient is φ = 74747472.

The previous prime is 74747371. The next prime is 74747507. The reversal of 74747473 is 37474747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55457809 + 19289664 = 7447^2 + 4392^2 .

It is a cyclic number.

It is not a de Polignac number, because 74747473 - 2²¹ = 72650321 is a prime.

It is not a weakly prime, because it can be changed into another prime (74747573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37373736 + 37373737.

It is an arithmetic number, because the mean of its divisors is an integer number (37373737).

Almost surely, 2^74747473 is an apocalyptic number.

It is an amenable number.

74747473 is a deficient number, since it is larger than the sum of its proper divisors (1).

74747473 is an equidigital number, since it uses as much as digits as its factorization.

74747473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460992, while the sum is 43.

The square root of 74747473 is about 8645.6620914769. The cubic root of 74747473 is about 421.2424903932.

The spelling of 74747473 in words is "seventy-four million, seven hundred forty-seven thousand, four hundred seventy-three".