1903961 has 2 divisors, whose sum is σ = 1903962. Its totient is φ = 1903960.

The previous prime is 1903931. The next prime is 1903969. The reversal of 1903961 is 1693091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990025 + 913936 = 995^2 + 956^2 .

It is an emirp because it is prime and its reverse (1693091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1903961 - 2⁶ = 1903897 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1903969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 951980 + 951981.

It is an arithmetic number, because the mean of its divisors is an integer number (951981).

2^1903961 is an apocalyptic number.

It is an amenable number.

1903961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1903961 is an equidigital number, since it uses as much as digits as its factorization.

1903961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1903961 is about 1379.8409328615. The cubic root of 1903961 is about 123.9422424390.

The spelling of 1903961 in words is "one million, nine hundred three thousand, nine hundred sixty-one".