74872477 has 2 divisors, whose sum is σ = 74872478. Its totient is φ = 74872476.

The previous prime is 74872463. The next prime is 74872481. The reversal of 74872477 is 77427847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38800441 + 36072036 = 6229^2 + 6006^2 .

It is a cyclic number.

It is not a de Polignac number, because 74872477 - 2¹¹ = 74870429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74872177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37436238 + 37436239.

It is an arithmetic number, because the mean of its divisors is an integer number (37436239).

Almost surely, 2^74872477 is an apocalyptic number.

It is an amenable number.

74872477 is a deficient number, since it is larger than the sum of its proper divisors (1).

74872477 is an equidigital number, since it uses as much as digits as its factorization.

74872477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 614656, while the sum is 46.

The square root of 74872477 is about 8652.8883616975. Note that the first 3 decimals coincide. The cubic root of 74872477 is about 421.4771813588.

The spelling of 74872477 in words is "seventy-four million, eight hundred seventy-two thousand, four hundred seventy-seven".