381290737 has 2 divisors, whose sum is σ = 381290738. Its totient is φ = 381290736.

The previous prime is 381290719. The next prime is 381290747. The reversal of 381290737 is 737092183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275427216 + 105863521 = 16596^2 + 10289^2 .

It is an emirp because it is prime and its reverse (737092183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381290737 - 2¹¹ = 381288689 is a prime.

It is a super-2 number, since 2×381290737² = 290765252244006338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381290737.

It is not a weakly prime, because it can be changed into another prime (381290717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190645368 + 190645369.

It is an arithmetic number, because the mean of its divisors is an integer number (190645369).

Almost surely, 2^381290737 is an apocalyptic number.

It is an amenable number.

381290737 is a deficient number, since it is larger than the sum of its proper divisors (1).

381290737 is an equidigital number, since it uses as much as digits as its factorization.

381290737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 381290737 is about 19526.6673295778. The cubic root of 381290737 is about 725.1348061653.

It can be divided in two parts, 3812 and 90737, that added together give a palindrome (94549).

The spelling of 381290737 in words is "three hundred eighty-one million, two hundred ninety thousand, seven hundred thirty-seven".