390641533 has 2 divisors, whose sum is σ = 390641534. Its totient is φ = 390641532.

The previous prime is 390641519. The next prime is 390641543. The reversal of 390641533 is 335146093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323352324 + 67289209 = 17982^2 + 8203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390641533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390641543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195320766 + 195320767.

It is an arithmetic number, because the mean of its divisors is an integer number (195320767).

Almost surely, 2^390641533 is an apocalyptic number.

It is an amenable number.

390641533 is a deficient number, since it is larger than the sum of its proper divisors (1).

390641533 is an equidigital number, since it uses as much as digits as its factorization.

390641533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 34.

The square root of 390641533 is about 19764.6536271193. The cubic root of 390641533 is about 731.0147475352.

The spelling of 390641533 in words is "three hundred ninety million, six hundred forty-one thousand, five hundred thirty-three".