74800381 has 2 divisors, whose sum is σ = 74800382. Its totient is φ = 74800380.

The previous prime is 74800379. The next prime is 74800387. The reversal of 74800381 is 18300847.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54243225 + 20557156 = 7365^2 + 4534^2 .

It is a cyclic number.

It is not a de Polignac number, because 74800381 - 2¹ = 74800379 is a prime.

It is a super-2 number, since 2×74800381² = 11190193995490322, which contains 22 as substring.

Together with 74800379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74800387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37400190 + 37400191.

It is an arithmetic number, because the mean of its divisors is an integer number (37400191).

Almost surely, 2^74800381 is an apocalyptic number.

It is an amenable number.

74800381 is a deficient number, since it is larger than the sum of its proper divisors (1).

74800381 is an equidigital number, since it uses as much as digits as its factorization.

74800381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 74800381 is about 8648.7213505813. The cubic root of 74800381 is about 421.3418553635.

The spelling of 74800381 in words is "seventy-four million, eight hundred thousand, three hundred eighty-one".