1331929 has 2 divisors, whose sum is σ = 1331930. Its totient is φ = 1331928.

The previous prime is 1331923. The next prime is 1331951. The reversal of 1331929 is 9291331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 912025 + 419904 = 955^2 + 648^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331929 - 2³ = 1331921 is a prime.

It is a super-2 number, since 2×1331929² = 3548069722082, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1331897 and 1331906.

It is not a weakly prime, because it can be changed into another prime (1331921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665964 + 665965.

It is an arithmetic number, because the mean of its divisors is an integer number (665965).

2^1331929 is an apocalyptic number.

It is an amenable number.

1331929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331929 is an equidigital number, since it uses as much as digits as its factorization.

1331929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 28.

The square root of 1331929 is about 1154.0922840051. The cubic root of 1331929 is about 110.0255863346.

The spelling of 1331929 in words is "one million, three hundred thirty-one thousand, nine hundred twenty-nine".