4921972997 has 2 divisors, whose sum is σ = 4921972998. Its totient is φ = 4921972996.

The previous prime is 4921972987. The next prime is 4921972999. The reversal of 4921972997 is 7992791294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3308665441 + 1613307556 = 57521^2 + 40166^2 .

It is a cyclic number.

It is not a de Polignac number, because 4921972997 - 2⁴ = 4921972981 is a prime.

Together with 4921972999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4921972999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2460986498 + 2460986499.

It is an arithmetic number, because the mean of its divisors is an integer number (2460986499).

Almost surely, 2^4921972997 is an apocalyptic number.

It is an amenable number.

4921972997 is a deficient number, since it is larger than the sum of its proper divisors (1).

4921972997 is an equidigital number, since it uses as much as digits as its factorization.

4921972997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 59.

The square root of 4921972997 is about 70156.7744198663. The cubic root of 4921972997 is about 1701.0343183207.

The spelling of 4921972997 in words is "four billion, nine hundred twenty-one million, nine hundred seventy-two thousand, nine hundred ninety-seven".