1391960029 has 2 divisors, whose sum is σ = 1391960030. Its totient is φ = 1391960028.

The previous prime is 1391959981. The next prime is 1391960033. The reversal of 1391960029 is 9200691931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1306822500 + 85137529 = 36150^2 + 9227^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391960029 - 2⁷ = 1391959901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1391959973 and 1391960000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391960429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695980014 + 695980015.

It is an arithmetic number, because the mean of its divisors is an integer number (695980015).

Almost surely, 2^1391960029 is an apocalyptic number.

It is an amenable number.

1391960029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391960029 is an equidigital number, since it uses as much as digits as its factorization.

1391960029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 1391960029 is about 37308.9805408832. The cubic root of 1391960029 is about 1116.5433470212.

The spelling of 1391960029 in words is "one billion, three hundred ninety-one million, nine hundred sixty thousand, twenty-nine".