7972550477 has 2 divisors, whose sum is σ = 7972550478. Its totient is φ = 7972550476.

The previous prime is 7972550459. The next prime is 7972550527. The reversal of 7972550477 is 7740552797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7060872841 + 911677636 = 84029^2 + 30194^2 .

It is an emirp because it is prime and its reverse (7740552797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7972550477 - 2⁸ = 7972550221 is a prime.

It is a super-2 number, since 2×7972550477² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7972550437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986275238 + 3986275239.

It is an arithmetic number, because the mean of its divisors is an integer number (3986275239).

Almost surely, 2^7972550477 is an apocalyptic number.

It is an amenable number.

7972550477 is a deficient number, since it is larger than the sum of its proper divisors (1).

7972550477 is an equidigital number, since it uses as much as digits as its factorization.

7972550477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4321800, while the sum is 53.

The square root of 7972550477 is about 89289.1397483479. The cubic root of 7972550477 is about 1997.7099185143.

The spelling of 7972550477 in words is "seven billion, nine hundred seventy-two million, five hundred fifty thousand, four hundred seventy-seven".