988198723 has 2 divisors, whose sum is σ = 988198724. Its totient is φ = 988198722.

The previous prime is 988198699. The next prime is 988198807. The reversal of 988198723 is 327891889.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 988198723 - 2⁵ = 988198691 is a prime.

It is a super-2 number, since 2×988198723² = 1953073432277661458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (988198223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494099361 + 494099362.

It is an arithmetic number, because the mean of its divisors is an integer number (494099362).

Almost surely, 2^988198723 is an apocalyptic number.

988198723 is a deficient number, since it is larger than the sum of its proper divisors (1).

988198723 is an equidigital number, since it uses as much as digits as its factorization.

988198723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 55.

The square root of 988198723 is about 31435.6282424894. The cubic root of 988198723 is about 996.0506642803.

The spelling of 988198723 in words is "nine hundred eighty-eight million, one hundred ninety-eight thousand, seven hundred twenty-three".