53778401 has 2 divisors, whose sum is σ = 53778402. Its totient is φ = 53778400.

The previous prime is 53778377. The next prime is 53778409. The reversal of 53778401 is 10487735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48720400 + 5058001 = 6980^2 + 2249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53778401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53778409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26889200 + 26889201.

It is an arithmetic number, because the mean of its divisors is an integer number (26889201).

Almost surely, 2^53778401 is an apocalyptic number.

It is an amenable number.

53778401 is a deficient number, since it is larger than the sum of its proper divisors (1).

53778401 is an equidigital number, since it uses as much as digits as its factorization.

53778401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 53778401 is about 7333.3758256345. The cubic root of 53778401 is about 377.4585741715.

The spelling of 53778401 in words is "fifty-three million, seven hundred seventy-eight thousand, four hundred one".