47345621 has 4 divisors (see below), whose sum is σ = 47436672. Its totient is φ = 47254572.

The previous prime is 47345593. The next prime is 47345647. The reversal of 47345621 is 12654374.

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 47345621 - 2¹⁴ = 47329237 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 (47345651) 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, 44741 + ... + 45786.

It is an arithmetic number, because the mean of its divisors is an integer number (11859168).

Almost surely, 2^47345621 is an apocalyptic number.

It is an amenable number.

47345621 is a deficient number, since it is larger than the sum of its proper divisors (91051).

47345621 is an equidigital number, since it uses as much as digits as its factorization.

47345621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91050.

The product of its digits is 20160, while the sum is 32.

The square root of 47345621 is about 6880.8154313279. The cubic root of 47345621 is about 361.7650485420.

Adding to 47345621 its reverse (12654374), we get a palindrome (59999995).

The spelling of 47345621 in words is "forty-seven million, three hundred forty-five thousand, six hundred twenty-one".