74216477 has 4 divisors (see below), whose sum is σ = 75050460. Its totient is φ = 73382496.

The previous prime is 74216473. The next prime is 74216491. The reversal of 74216477 is 77461247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52041796 + 22174681 = 7214^2 + 4709^2 .

It is a cyclic number.

It is not a de Polignac number, because 74216477 - 2² = 74216473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74216477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74216473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416858 + ... + 417035.

It is an arithmetic number, because the mean of its divisors is an integer number (18762615).

Almost surely, 2^74216477 is an apocalyptic number.

It is an amenable number.

74216477 is a deficient number, since it is larger than the sum of its proper divisors (833983).

74216477 is an equidigital number, since it uses as much as digits as its factorization.

74216477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833982.

The product of its digits is 65856, while the sum is 38.

The square root of 74216477 is about 8614.8985484450. The cubic root of 74216477 is about 420.2426356895.

The spelling of 74216477 in words is "seventy-four million, two hundred sixteen thousand, four hundred seventy-seven".