390917141 has 2 divisors, whose sum is σ = 390917142. Its totient is φ = 390917140.

The previous prime is 390917123. The next prime is 390917143. The reversal of 390917141 is 141719093.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369024100 + 21893041 = 19210^2 + 4679^2 .

It is an emirp because it is prime and its reverse (141719093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390917141 - 2¹⁰ = 390916117 is a prime.

It is a super-2 number, since 2×390917141² = 305632422255227762, which contains 22 as substring.

Together with 390917143, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_20877362 and since 390917141 and 20877362 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390917143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195458570 + 195458571.

It is an arithmetic number, because the mean of its divisors is an integer number (195458571).

Almost surely, 2^390917141 is an apocalyptic number.

It is an amenable number.

390917141 is a deficient number, since it is larger than the sum of its proper divisors (1).

390917141 is an equidigital number, since it uses as much as digits as its factorization.

390917141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 390917141 is about 19771.6246424010. The cubic root of 390917141 is about 731.1866239082.

The spelling of 390917141 in words is "three hundred ninety million, nine hundred seventeen thousand, one hundred forty-one".