5239681901 has 2 divisors, whose sum is σ = 5239681902. Its totient is φ = 5239681900.

The previous prime is 5239681841. The next prime is 5239681921. The reversal of 5239681901 is 1091869325.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4294180900 + 945501001 = 65530^2 + 30749^2 .

It is a cyclic number.

It is not a de Polignac number, because 5239681901 - 2²² = 5235487597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5239681921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619840950 + 2619840951.

It is an arithmetic number, because the mean of its divisors is an integer number (2619840951).

Almost surely, 2^5239681901 is an apocalyptic number.

It is an amenable number.

5239681901 is a deficient number, since it is larger than the sum of its proper divisors (1).

5239681901 is an equidigital number, since it uses as much as digits as its factorization.

5239681901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 5239681901 is about 72385.6470648705. The cubic root of 5239681901 is about 1736.8739729458.

The spelling of 5239681901 in words is "five billion, two hundred thirty-nine million, six hundred eighty-one thousand, nine hundred one".