390432629 has 2 divisors, whose sum is σ = 390432630. Its totient is φ = 390432628.

The previous prime is 390432617. The next prime is 390432649. The reversal of 390432629 is 926234093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378886225 + 11546404 = 19465^2 + 3398^2 .

It is an emirp because it is prime and its reverse (926234093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390432629 - 2⁸ = 390432373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 390432592 and 390432601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390432649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195216314 + 195216315.

It is an arithmetic number, because the mean of its divisors is an integer number (195216315).

Almost surely, 2^390432629 is an apocalyptic number.

It is an amenable number.

390432629 is a deficient number, since it is larger than the sum of its proper divisors (1).

390432629 is an equidigital number, since it uses as much as digits as its factorization.

390432629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 390432629 is about 19759.3681326099. The cubic root of 390432629 is about 730.8844156564.

The spelling of 390432629 in words is "three hundred ninety million, four hundred thirty-two thousand, six hundred twenty-nine".