998705401 has 16 divisors (see below), whose sum is σ = 1040402880. Its totient is φ = 958003200.

The previous prime is 998705399. The next prime is 998705423. The reversal of 998705401 is 104507899.

It is a 5-Lehmer number, since φ(998705401) divides (998705401-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 998705401 - 2¹ = 998705399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (998705431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623001 + ... + 624601.

It is an arithmetic number, because the mean of its divisors is an integer number (65025180).

Almost surely, 2^998705401 is an apocalyptic number.

It is an amenable number.

998705401 is a deficient number, since it is larger than the sum of its proper divisors (41697479).

998705401 is a wasteful number, since it uses less digits than its factorization.

998705401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 998705401 is about 31602.3005649905. The cubic root of 998705401 is about 999.5682806452.

The spelling of 998705401 in words is "nine hundred ninety-eight million, seven hundred five thousand, four hundred one".