998437667 has 2 divisors, whose sum is σ = 998437668. Its totient is φ = 998437666.

The previous prime is 998437663. The next prime is 998437673. The reversal of 998437667 is 766734899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998437667 - 2² = 998437663 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998437663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499218833 + 499218834.

It is an arithmetic number, because the mean of its divisors is an integer number (499218834).

Almost surely, 2^998437667 is an apocalyptic number.

998437667 is a deficient number, since it is larger than the sum of its proper divisors (1).

998437667 is an equidigital number, since it uses as much as digits as its factorization.

998437667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 59.

The square root of 998437667 is about 31598.0642919784. The cubic root of 998437667 is about 999.4789508883.

The spelling of 998437667 in words is "nine hundred ninety-eight million, four hundred thirty-seven thousand, six hundred sixty-seven".