1948981 has 2 divisors, whose sum is σ = 1948982. Its totient is φ = 1948980.

The previous prime is 1948937. The next prime is 1948987. The reversal of 1948981 is 1898491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 749956 = 1095^2 + 866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1948981 - 2¹¹ = 1946933 is a prime.

It is a super-2 number, since 2×1948981² = 7597053876722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1948987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974490 + 974491.

It is an arithmetic number, because the mean of its divisors is an integer number (974491).

2^1948981 is an apocalyptic number.

It is an amenable number.

1948981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948981 is an equidigital number, since it uses as much as digits as its factorization.

1948981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 40.

The square root of 1948981 is about 1396.0590961704. The cubic root of 1948981 is about 124.9115320688.

The spelling of 1948981 in words is "one million, nine hundred forty-eight thousand, nine hundred eighty-one".