890149423 has 2 divisors, whose sum is σ = 890149424. Its totient is φ = 890149422.

The previous prime is 890149409. The next prime is 890149433. The reversal of 890149423 is 324941098.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 890149423 - 2²¹ = 888052271 is a prime.

It is equal to p_45531697 and since 890149423 and 45531697 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 (890149433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445074711 + 445074712.

It is an arithmetic number, because the mean of its divisors is an integer number (445074712).

Almost surely, 2^890149423 is an apocalyptic number.

890149423 is a deficient number, since it is larger than the sum of its proper divisors (1).

890149423 is an equidigital number, since it uses as much as digits as its factorization.

890149423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 890149423 is about 29835.3720104174. The cubic root of 890149423 is about 961.9540000596.

The spelling of 890149423 in words is "eight hundred ninety million, one hundred forty-nine thousand, four hundred twenty-three".