74649601 has 8 divisors (see below), whose sum is σ = 85121064. Its totient is φ = 64853760.

The previous prime is 74649593. The next prime is 74649607. The reversal of 74649601 is 10694647.

It is a Cunningham number, because it is equal to 8640²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 74649600 = 1^2 + 8640^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 74649601 - 2³ = 74649593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74649607) 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, 168670 + ... + 169111.

It is an arithmetic number, because the mean of its divisors is an integer number (10640133).

Almost surely, 2^74649601 is an apocalyptic number.

It is an amenable number.

74649601 is a deficient number, since it is larger than the sum of its proper divisors (10471463).

74649601 is a wasteful number, since it uses less digits than its factorization.

74649601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337811.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 74649601 is about 8640.0000578704. Note that the first 4 decimals coincide. The cubic root of 74649601 is about 421.0585561828.

The spelling of 74649601 in words is "seventy-four million, six hundred forty-nine thousand, six hundred one".