2478421973 has 2 divisors, whose sum is σ = 2478421974. Its totient is φ = 2478421972.

The previous prime is 2478421951. The next prime is 2478422039. The reversal of 2478421973 is 3791248742.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2167181809 + 311240164 = 46553^2 + 17642^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478421973 - 2²² = 2474227669 is a prime.

It is a super-2 number, since 2×2478421973² = 12285150952498425458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2478421903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239210986 + 1239210987.

It is an arithmetic number, because the mean of its divisors is an integer number (1239210987).

Almost surely, 2^2478421973 is an apocalyptic number.

It is an amenable number.

2478421973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478421973 is an equidigital number, since it uses as much as digits as its factorization.

2478421973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 2478421973 is about 49783.7520984508. The cubic root of 2478421973 is about 1353.2927346664.

The spelling of 2478421973 in words is "two billion, four hundred seventy-eight million, four hundred twenty-one thousand, nine hundred seventy-three".