1929913 has 2 divisors, whose sum is σ = 1929914. Its totient is φ = 1929912.

The previous prime is 1929899. The next prime is 1929923. The reversal of 1929913 is 3199291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1671849 + 258064 = 1293^2 + 508^2 .

It is an emirp because it is prime and its reverse (3199291) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1929913 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1929923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964956 + 964957.

It is an arithmetic number, because the mean of its divisors is an integer number (964957).

2^1929913 is an apocalyptic number.

It is an amenable number.

1929913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1929913 is an equidigital number, since it uses as much as digits as its factorization.

1929913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 34.

The square root of 1929913 is about 1389.2130866069. The cubic root of 1929913 is about 124.5028359112.

The spelling of 1929913 in words is "one million, nine hundred twenty-nine thousand, nine hundred thirteen".