74063621 has 4 divisors (see below), whose sum is σ = 74436000. Its totient is φ = 73691244.

The previous prime is 74063617. The next prime is 74063623. The reversal of 74063621 is 12636047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12636047 = 3307 ⋅3821.

It is a cyclic number.

It is not a de Polignac number, because 74063621 - 2² = 74063617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74063623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185891 + ... + 186288.

It is an arithmetic number, because the mean of its divisors is an integer number (18609000).

Almost surely, 2^74063621 is an apocalyptic number.

It is an amenable number.

74063621 is a deficient number, since it is larger than the sum of its proper divisors (372379).

74063621 is a wasteful number, since it uses less digits than its factorization.

74063621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372378.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 74063621 is about 8606.0223680862. The cubic root of 74063621 is about 419.9539272969.

Adding to 74063621 its reverse (12636047), we get a palindrome (86699668).

The spelling of 74063621 in words is "seventy-four million, sixty-three thousand, six hundred twenty-one".