3720278477 has 2 divisors, whose sum is σ = 3720278478. Its totient is φ = 3720278476.

The previous prime is 3720278447. The next prime is 3720278491. The reversal of 3720278477 is 7748720273.

It is a happy number.

3720278477 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2352832036 + 1367446441 = 48506^2 + 36979^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720278477 - 2¹⁴ = 3720262093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3720278447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860139238 + 1860139239.

It is an arithmetic number, because the mean of its divisors is an integer number (1860139239).

Almost surely, 2^3720278477 is an apocalyptic number.

It is an amenable number.

3720278477 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720278477 is an equidigital number, since it uses as much as digits as its factorization.

3720278477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921984, while the sum is 47.

The square root of 3720278477 is about 60994.0855903259. The cubic root of 3720278477 is about 1549.5008419752.

The spelling of 3720278477 in words is "three billion, seven hundred twenty million, two hundred seventy-eight thousand, four hundred seventy-seven".