5918921 has 2 divisors, whose sum is σ = 5918922. Its totient is φ = 5918920.

The previous prime is 5918909. The next prime is 5918933. The reversal of 5918921 is 1298195.

It is a balanced prime because it is at equal distance from previous prime (5918909) and next prime (5918933).

It can be written as a sum of positive squares in only one way, i.e., 5707321 + 211600 = 2389^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 5918921 - 2¹⁰ = 5917897 is a prime.

It is not a weakly prime, because it can be changed into another prime (5918021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2959460 + 2959461.

It is an arithmetic number, because the mean of its divisors is an integer number (2959461).

Almost surely, 2^5918921 is an apocalyptic number.

It is an amenable number.

5918921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5918921 is an equidigital number, since it uses as much as digits as its factorization.

5918921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 35.

The square root of 5918921 is about 2432.8832688808. The cubic root of 5918921 is about 180.8898427219.

The spelling of 5918921 in words is "five million, nine hundred eighteen thousand, nine hundred twenty-one".