390118109 has 2 divisors, whose sum is σ = 390118110. Its totient is φ = 390118108.

The previous prime is 390118103. The next prime is 390118123. The reversal of 390118109 is 901811093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379392484 + 10725625 = 19478^2 + 3275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390118109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390118103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195059054 + 195059055.

It is an arithmetic number, because the mean of its divisors is an integer number (195059055).

Almost surely, 2^390118109 is an apocalyptic number.

It is an amenable number.

390118109 is a deficient number, since it is larger than the sum of its proper divisors (1).

390118109 is an equidigital number, since it uses as much as digits as its factorization.

390118109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 390118109 is about 19751.4077726121. The cubic root of 390118109 is about 730.6881039205.

The spelling of 390118109 in words is "three hundred ninety million, one hundred eighteen thousand, one hundred nine".