390044969 has 2 divisors, whose sum is σ = 390044970. Its totient is φ = 390044968.

The previous prime is 390044927. The next prime is 390045011. The reversal of 390044969 is 969440093.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (390044927) and next prime (390045011).

It can be written as a sum of positive squares in only one way, i.e., 356265625 + 33779344 = 18875^2 + 5812^2 .

It is a cyclic number.

It is not a de Polignac number, because 390044969 - 2²⁴ = 373267753 is a prime.

It is a super-3 number, since 3×390044969³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (390044909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195022484 + 195022485.

It is an arithmetic number, because the mean of its divisors is an integer number (195022485).

Almost surely, 2^390044969 is an apocalyptic number.

It is an amenable number.

390044969 is a deficient number, since it is larger than the sum of its proper divisors (1).

390044969 is an equidigital number, since it uses as much as digits as its factorization.

390044969 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 390044969 is about 19749.5561722283. The cubic root of 390044969 is about 730.6424375211.

The spelling of 390044969 in words is "three hundred ninety million, forty-four thousand, nine hundred sixty-nine".