890440357 has 2 divisors, whose sum is σ = 890440358. Its totient is φ = 890440356.

The previous prime is 890440319. The next prime is 890440361. The reversal of 890440357 is 753044098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655308801 + 235131556 = 25599^2 + 15334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890440357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890440367) 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, 445220178 + 445220179.

It is an arithmetic number, because the mean of its divisors is an integer number (445220179).

Almost surely, 2^890440357 is an apocalyptic number.

It is an amenable number.

890440357 is a deficient number, since it is larger than the sum of its proper divisors (1).

890440357 is an equidigital number, since it uses as much as digits as its factorization.

890440357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 890440357 is about 29840.2472677423. The cubic root of 890440357 is about 962.0587894478.

The spelling of 890440357 in words is "eight hundred ninety million, four hundred forty thousand, three hundred fifty-seven".