74726401 has 2 divisors, whose sum is σ = 74726402. Its totient is φ = 74726400.

The previous prime is 74726387. The next prime is 74726413. The reversal of 74726401 is 10462747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55577025 + 19149376 = 7455^2 + 4376^2 .

It is an emirp because it is prime and its reverse (10462747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74726401 - 2⁵ = 74726369 is a prime.

It is not a weakly prime, because it can be changed into another prime (74726501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37363200 + 37363201.

It is an arithmetic number, because the mean of its divisors is an integer number (37363201).

Almost surely, 2^74726401 is an apocalyptic number.

It is an amenable number.

74726401 is a deficient number, since it is larger than the sum of its proper divisors (1).

74726401 is an equidigital number, since it uses as much as digits as its factorization.

74726401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 74726401 is about 8644.4433597543. The cubic root of 74726401 is about 421.2029026290.

The spelling of 74726401 in words is "seventy-four million, seven hundred twenty-six thousand, four hundred one".