2447890421 has 2 divisors, whose sum is σ = 2447890422. Its totient is φ = 2447890420.

The previous prime is 2447890409. The next prime is 2447890433. The reversal of 2447890421 is 1240987442.

It is a balanced prime because it is at equal distance from previous prime (2447890409) and next prime (2447890433).

It can be written as a sum of positive squares in only one way, i.e., 1508467921 + 939422500 = 38839^2 + 30650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2447890421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2447890321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1223945210 + 1223945211.

It is an arithmetic number, because the mean of its divisors is an integer number (1223945211).

Almost surely, 2^2447890421 is an apocalyptic number.

It is an amenable number.

2447890421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2447890421 is an equidigital number, since it uses as much as digits as its factorization.

2447890421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 2447890421 is about 49476.1601278838. The cubic root of 2447890421 is about 1347.7127104908.

The spelling of 2447890421 in words is "two billion, four hundred forty-seven million, eight hundred ninety thousand, four hundred twenty-one".