390402277 has 2 divisors, whose sum is σ = 390402278. Its totient is φ = 390402276.

The previous prime is 390402247. The next prime is 390402307. The reversal of 390402277 is 772204093.

It is a balanced prime because it is at equal distance from previous prime (390402247) and next prime (390402307).

It can be written as a sum of positive squares in only one way, i.e., 355284801 + 35117476 = 18849^2 + 5926^2 .

It is a cyclic number.

It is not a de Polignac number, because 390402277 - 2¹⁵ = 390369509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390402217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195201138 + 195201139.

It is an arithmetic number, because the mean of its divisors is an integer number (195201139).

Almost surely, 2^390402277 is an apocalyptic number.

It is an amenable number.

390402277 is a deficient number, since it is larger than the sum of its proper divisors (1).

390402277 is an equidigital number, since it uses as much as digits as its factorization.

390402277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 390402277 is about 19758.6000769285. The cubic root of 390402277 is about 730.8654756592.

The spelling of 390402277 in words is "three hundred ninety million, four hundred two thousand, two hundred seventy-seven".