1098913817 has 2 divisors, whose sum is σ = 1098913818. Its totient is φ = 1098913816.

The previous prime is 1098913771. The next prime is 1098913831. The reversal of 1098913817 is 7183198901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591267856 + 507645961 = 24316^2 + 22531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098913817 - 2¹⁶ = 1098848281 is a prime.

It is a super-2 number, since 2×1098913817² = 2415223154387018978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1098913867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549456908 + 549456909.

It is an arithmetic number, because the mean of its divisors is an integer number (549456909).

Almost surely, 2^1098913817 is an apocalyptic number.

It is an amenable number.

1098913817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098913817 is an equidigital number, since it uses as much as digits as its factorization.

1098913817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 47.

The square root of 1098913817 is about 33149.8690344321. The cubic root of 1098913817 is about 1031.9402323143.

The spelling of 1098913817 in words is "one billion, ninety-eight million, nine hundred thirteen thousand, eight hundred seventeen".