890018057 has 2 divisors, whose sum is σ = 890018058. Its totient is φ = 890018056.

The previous prime is 890018053. The next prime is 890018069. The reversal of 890018057 is 750810098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679071481 + 210946576 = 26059^2 + 14524^2 .

It is a cyclic number.

It is not a de Polignac number, because 890018057 - 2² = 890018053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 890018057.

It is not a weakly prime, because it can be changed into another prime (890018053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445009028 + 445009029.

It is an arithmetic number, because the mean of its divisors is an integer number (445009029).

Almost surely, 2^890018057 is an apocalyptic number.

It is an amenable number.

890018057 is a deficient number, since it is larger than the sum of its proper divisors (1).

890018057 is an equidigital number, since it uses as much as digits as its factorization.

890018057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 890018057 is about 29833.1704148252. The cubic root of 890018057 is about 961.9066768189.

The spelling of 890018057 in words is "eight hundred ninety million, eighteen thousand, fifty-seven".