98651521 has 2 divisors, whose sum is σ = 98651522. Its totient is φ = 98651520.

The previous prime is 98651519. The next prime is 98651549. The reversal of 98651521 is 12515689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72437121 + 26214400 = 8511^2 + 5120^2 .

It is a cyclic number.

It is not a de Polignac number, because 98651521 - 2¹ = 98651519 is a prime.

It is a super-2 number, since 2×98651521² = 19464245191226882, which contains 22 as substring.

Together with 98651519, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98651551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49325760 + 49325761.

It is an arithmetic number, because the mean of its divisors is an integer number (49325761).

Almost surely, 2^98651521 is an apocalyptic number.

It is an amenable number.

98651521 is a deficient number, since it is larger than the sum of its proper divisors (1).

98651521 is an equidigital number, since it uses as much as digits as its factorization.

98651521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 37.

The square root of 98651521 is about 9932.3472049662. The cubic root of 98651521 is about 462.0630727279.

The spelling of 98651521 in words is "ninety-eight million, six hundred fifty-one thousand, five hundred twenty-one".