98405491 has 2 divisors, whose sum is σ = 98405492. Its totient is φ = 98405490.

The previous prime is 98405449. The next prime is 98405507. The reversal of 98405491 is 19450489.

It is a strong prime.

It is an emirp because it is prime and its reverse (19450489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98405491 - 2¹⁷ = 98274419 is a prime.

It is not a weakly prime, because it can be changed into another prime (98405441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49202745 + 49202746.

It is an arithmetic number, because the mean of its divisors is an integer number (49202746).

Almost surely, 2^98405491 is an apocalyptic number.

98405491 is a deficient number, since it is larger than the sum of its proper divisors (1).

98405491 is an equidigital number, since it uses as much as digits as its factorization.

98405491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 98405491 is about 9919.9541833619. The cubic root of 98405491 is about 461.6786352918.

The spelling of 98405491 in words is "ninety-eight million, four hundred five thousand, four hundred ninety-one".