1901329 has 2 divisors, whose sum is σ = 1901330. Its totient is φ = 1901328.

The previous prime is 1901299. The next prime is 1901353. The reversal of 1901329 is 9231091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1476225 + 425104 = 1215^2 + 652^2 .

It is an emirp because it is prime and its reverse (9231091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1901329 - 2⁷ = 1901201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1901359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950664 + 950665.

It is an arithmetic number, because the mean of its divisors is an integer number (950665).

2^1901329 is an apocalyptic number.

It is an amenable number.

1901329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901329 is an equidigital number, since it uses as much as digits as its factorization.

1901329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1901329 is about 1378.8868699063. The cubic root of 1901329 is about 123.8851042910.

The spelling of 1901329 in words is "one million, nine hundred one thousand, three hundred twenty-nine".