47421389 has 4 divisors (see below), whose sum is σ = 48524256. Its totient is φ = 46318524.

The previous prime is 47421371. The next prime is 47421401. The reversal of 47421389 is 98312474.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47421389 - 2¹⁶ = 47355853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47421349) 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, 551369 + ... + 551454.

It is an arithmetic number, because the mean of its divisors is an integer number (12131064).

Almost surely, 2^47421389 is an apocalyptic number.

It is an amenable number.

47421389 is a deficient number, since it is larger than the sum of its proper divisors (1102867).

47421389 is a wasteful number, since it uses less digits than its factorization.

47421389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102866.

The product of its digits is 48384, while the sum is 38.

The square root of 47421389 is about 6886.3189731525. The cubic root of 47421389 is about 361.9579252708.

The spelling of 47421389 in words is "forty-seven million, four hundred twenty-one thousand, three hundred eighty-nine".