390429269 has 2 divisors, whose sum is σ = 390429270. Its totient is φ = 390429268.

The previous prime is 390429257. The next prime is 390429287. The reversal of 390429269 is 962924093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380757169 + 9672100 = 19513^2 + 3110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390429269 is a prime.

It is a super-2 number, since 2×390429269² = 304870028183748722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390429229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195214634 + 195214635.

It is an arithmetic number, because the mean of its divisors is an integer number (195214635).

Almost surely, 2^390429269 is an apocalyptic number.

It is an amenable number.

390429269 is a deficient number, since it is larger than the sum of its proper divisors (1).

390429269 is an equidigital number, since it uses as much as digits as its factorization.

390429269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 390429269 is about 19759.2831094653. The cubic root of 390429269 is about 730.8823190260.

The spelling of 390429269 in words is "three hundred ninety million, four hundred twenty-nine thousand, two hundred sixty-nine".