1939481 has 2 divisors, whose sum is σ = 1939482. Its totient is φ = 1939480.

The previous prime is 1939447. The next prime is 1939489. The reversal of 1939481 is 1849391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1915456 + 24025 = 1384^2 + 155^2 .

It is an emirp because it is prime and its reverse (1849391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1939481 - 2¹⁸ = 1677337 is a prime.

It is a super-2 number, since 2×1939481² = 7523173098722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1939489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969740 + 969741.

It is an arithmetic number, because the mean of its divisors is an integer number (969741).

2^1939481 is an apocalyptic number.

It is an amenable number.

1939481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939481 is an equidigital number, since it uses as much as digits as its factorization.

1939481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 1939481 is about 1392.6525051139. The cubic root of 1939481 is about 124.7082475740.

The spelling of 1939481 in words is "one million, nine hundred thirty-nine thousand, four hundred eighty-one".