74908821 has 8 divisors (see below), whose sum is σ = 107561440. Its totient is φ = 46097712.

The previous prime is 74908807. The next prime is 74908837. The reversal of 74908821 is 12880947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74908821 - 2⁷ = 74908693 is a prime.

It is a super-2 number, since 2×74908821² = 11222662927220082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1920739 = 74908821 / (7 + 4 + 9 + 0 + 8 + 8 + 2 + 1).

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 74908821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74908721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960331 + ... + 960408.

It is an arithmetic number, because the mean of its divisors is an integer number (13445180).

Almost surely, 2^74908821 is an apocalyptic number.

It is an amenable number.

74908821 is a deficient number, since it is larger than the sum of its proper divisors (32652619).

74908821 is a wasteful number, since it uses less digits than its factorization.

74908821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920755.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 74908821 is about 8654.9882148967. The cubic root of 74908821 is about 421.5453670234.

The spelling of 74908821 in words is "seventy-four million, nine hundred eight thousand, eight hundred twenty-one".