381025901 has 2 divisors, whose sum is σ = 381025902. Its totient is φ = 381025900.

The previous prime is 381025877. The next prime is 381025903. The reversal of 381025901 is 109520183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342213001 + 38812900 = 18499^2 + 6230^2 .

It is a cyclic number.

It is not a de Polignac number, because 381025901 - 2⁶ = 381025837 is a prime.

It is a Sophie Germain prime.

Together with 381025903, it forms a pair of twin primes.

It is a Chen 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 (381025903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190512950 + 190512951.

It is an arithmetic number, because the mean of its divisors is an integer number (190512951).

Almost surely, 2^381025901 is an apocalyptic number.

It is an amenable number.

381025901 is a deficient number, since it is larger than the sum of its proper divisors (1).

381025901 is an equidigital number, since it uses as much as digits as its factorization.

381025901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 381025901 is about 19519.8847588811. The cubic root of 381025901 is about 724.9668798187.

The spelling of 381025901 in words is "three hundred eighty-one million, twenty-five thousand, nine hundred one".