7493809997 has 2 divisors, whose sum is σ = 7493809998. Its totient is φ = 7493809996.

The previous prime is 7493809987. The next prime is 7493810041. The reversal of 7493809997 is 7999083947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7493672356 + 137641 = 86566^2 + 371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7493809997 is a prime.

It is a super-2 number, since 2×7493809997² (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 (7493809987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3746904998 + 3746904999.

It is an arithmetic number, because the mean of its divisors is an integer number (3746904999).

Almost surely, 2^7493809997 is an apocalyptic number.

It is an amenable number.

7493809997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7493809997 is an equidigital number, since it uses as much as digits as its factorization.

7493809997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30862944, while the sum is 65.

The square root of 7493809997 is about 86566.7950024719. The cubic root of 7493809997 is about 1956.8951603114.

The spelling of 7493809997 in words is "seven billion, four hundred ninety-three million, eight hundred nine thousand, nine hundred ninety-seven".