74786401 has 2 divisors, whose sum is σ = 74786402. Its totient is φ = 74786400.

The previous prime is 74786351. The next prime is 74786407. The reversal of 74786401 is 10468747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40259025 + 34527376 = 6345^2 + 5876^2 .

It is an emirp because it is prime and its reverse (10468747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74786401 - 2¹⁵ = 74753633 is a prime.

It is not a weakly prime, because it can be changed into another prime (74786407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37393200 + 37393201.

It is an arithmetic number, because the mean of its divisors is an integer number (37393201).

Almost surely, 2^74786401 is an apocalyptic number.

It is an amenable number.

74786401 is a deficient number, since it is larger than the sum of its proper divisors (1).

74786401 is an equidigital number, since it uses as much as digits as its factorization.

74786401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 74786401 is about 8647.9131008585. The cubic root of 74786401 is about 421.3156044894.

The spelling of 74786401 in words is "seventy-four million, seven hundred eighty-six thousand, four hundred one".