7290904981 has 2 divisors, whose sum is σ = 7290904982. Its totient is φ = 7290904980.

The previous prime is 7290904969. The next prime is 7290905099. The reversal of 7290904981 is 1894090927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4068526225 + 3222378756 = 63785^2 + 56766^2 .

It is a cyclic number.

It is not a de Polignac number, because 7290904981 - 2⁵ = 7290904949 is a prime.

It is a super-2 number, since 2×7290904981² (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 (7290904921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3645452490 + 3645452491.

It is an arithmetic number, because the mean of its divisors is an integer number (3645452491).

Almost surely, 2^7290904981 is an apocalyptic number.

It is an amenable number.

7290904981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7290904981 is an equidigital number, since it uses as much as digits as its factorization.

7290904981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 7290904981 is about 85386.7962919326. The cubic root of 7290904981 is about 1939.0714532010.

The spelling of 7290904981 in words is "seven billion, two hundred ninety million, nine hundred four thousand, nine hundred eighty-one".