74578001 has 2 divisors, whose sum is σ = 74578002. Its totient is φ = 74578000.

The previous prime is 74577991. The next prime is 74578003. The reversal of 74578001 is 10087547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73547776 + 1030225 = 8576^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 74578001 - 2²² = 70383697 is a prime.

Together with 74578003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74578003) 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 as a sum of consecutive naturals, namely, 37289000 + 37289001.

It is an arithmetic number, because the mean of its divisors is an integer number (37289001).

Almost surely, 2^74578001 is an apocalyptic number.

It is an amenable number.

74578001 is a deficient number, since it is larger than the sum of its proper divisors (1).

74578001 is an equidigital number, since it uses as much as digits as its factorization.

74578001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 74578001 is about 8635.8555453412. The cubic root of 74578001 is about 420.9238939918.

The spelling of 74578001 in words is "seventy-four million, five hundred seventy-eight thousand, one".