74138401 has 2 divisors, whose sum is σ = 74138402. Its totient is φ = 74138400.

The previous prime is 74138387. The next prime is 74138429. The reversal of 74138401 is 10483147.

It is an a-pointer prime, because the next prime (74138429) can be obtained adding 74138401 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61606801 + 12531600 = 7849^2 + 3540^2 .

It is a cyclic number.

It is not a de Polignac number, because 74138401 - 2¹³ = 74130209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74138401.

It is not a weakly prime, because it can be changed into another prime (74138201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37069200 + 37069201.

It is an arithmetic number, because the mean of its divisors is an integer number (37069201).

Almost surely, 2^74138401 is an apocalyptic number.

It is an amenable number.

74138401 is a deficient number, since it is larger than the sum of its proper divisors (1).

74138401 is an equidigital number, since it uses as much as digits as its factorization.

74138401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 74138401 is about 8610.3659039555. The cubic root of 74138401 is about 420.0952183962.

The spelling of 74138401 in words is "seventy-four million, one hundred thirty-eight thousand, four hundred one".