98621729 has 2 divisors, whose sum is σ = 98621730. Its totient is φ = 98621728.

The previous prime is 98621713. The next prime is 98621741. The reversal of 98621729 is 92712689.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78730129 + 19891600 = 8873^2 + 4460^2 .

It is an emirp because it is prime and its reverse (92712689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98621729 - 2⁴ = 98621713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 98621729.

It is not a weakly prime, because it can be changed into another prime (98621329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49310864 + 49310865.

It is an arithmetic number, because the mean of its divisors is an integer number (49310865).

Almost surely, 2^98621729 is an apocalyptic number.

It is an amenable number.

98621729 is a deficient number, since it is larger than the sum of its proper divisors (1).

98621729 is an equidigital number, since it uses as much as digits as its factorization.

98621729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 98621729 is about 9930.8473455189. The cubic root of 98621729 is about 462.0165548811.

The spelling of 98621729 in words is "ninety-eight million, six hundred twenty-one thousand, seven hundred twenty-nine".