890723513 has 2 divisors, whose sum is σ = 890723514. Its totient is φ = 890723512.

The previous prime is 890723489. The next prime is 890723521. The reversal of 890723513 is 315327098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692110864 + 198612649 = 26308^2 + 14093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890723513 is a prime.

It is a super-2 number, since 2×890723513² = 1586776753222122338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (890723563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445361756 + 445361757.

It is an arithmetic number, because the mean of its divisors is an integer number (445361757).

Almost surely, 2^890723513 is an apocalyptic number.

It is an amenable number.

890723513 is a deficient number, since it is larger than the sum of its proper divisors (1).

890723513 is an equidigital number, since it uses as much as digits as its factorization.

890723513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 890723513 is about 29844.9914223476. The cubic root of 890723513 is about 962.1607554194.

The spelling of 890723513 in words is "eight hundred ninety million, seven hundred twenty-three thousand, five hundred thirteen".