5479939921 has 2 divisors, whose sum is σ = 5479939922. Its totient is φ = 5479939920.

The previous prime is 5479939901. The next prime is 5479939973. The reversal of 5479939921 is 1299399745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3677088321 + 1802851600 = 60639^2 + 42460^2 .

It is a cyclic number.

It is not a de Polignac number, because 5479939921 - 2⁵ = 5479939889 is a prime.

It is not a weakly prime, because it can be changed into another prime (5479939901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2739969960 + 2739969961.

It is an arithmetic number, because the mean of its divisors is an integer number (2739969961).

Almost surely, 2^5479939921 is an apocalyptic number.

It is an amenable number.

5479939921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5479939921 is an equidigital number, since it uses as much as digits as its factorization.

5479939921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 58.

The square root of 5479939921 is about 74026.6163011656. The cubic root of 5479939921 is about 1763.0255209798.

The spelling of 5479939921 in words is "five billion, four hundred seventy-nine million, nine hundred thirty-nine thousand, nine hundred twenty-one".