890421349631 has 4 divisors (see below), whose sum is σ = 971368745064. Its totient is φ = 809473954200.

The previous prime is 890421349591. The next prime is 890421349637. The reversal of 890421349631 is 136943124098.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890421349631 is a prime.

It is a super-2 number, since 2×890421349631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 890421349631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890421349637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40473697700 + ... + 40473697721.

It is an arithmetic number, because the mean of its divisors is an integer number (242842186266).

Almost surely, 2^890421349631 is an apocalyptic number.

890421349631 is a deficient number, since it is larger than the sum of its proper divisors (80947395433).

890421349631 is a wasteful number, since it uses less digits than its factorization.

890421349631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80947395432.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 890421349631 in words is "eight hundred ninety billion, four hundred twenty-one million, three hundred forty-nine thousand, six hundred thirty-one".