390933188641 has 2 divisors, whose sum is σ = 390933188642. Its totient is φ = 390933188640.

The previous prime is 390933188621. The next prime is 390933188663. The reversal of 390933188641 is 146881339093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255096715041 + 135836473600 = 505071^2 + 368560^2 .

It is an emirp because it is prime and its reverse (146881339093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390933188641 - 2²³ = 390924800033 is a prime.

It is not a weakly prime, because it can be changed into another prime (390933188621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195466594320 + 195466594321.

It is an arithmetic number, because the mean of its divisors is an integer number (195466594321).

Almost surely, 2^390933188641 is an apocalyptic number.

It is an amenable number.

390933188641 is a deficient number, since it is larger than the sum of its proper divisors (1).

390933188641 is an equidigital number, since it uses as much as digits as its factorization.

390933188641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 390933188641 in words is "three hundred ninety billion, nine hundred thirty-three million, one hundred eighty-eight thousand, six hundred forty-one".