998749610 has 16 divisors (see below), whose sum is σ = 1815550632. Its totient is φ = 395544000.

The previous prime is 998749579. The next prime is 998749639. The reversal of 998749610 is 16947899.

It is a happy number.

It is a Cunningham number, because it is equal to 31603²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 998749609 + 1 = 31603^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493421 + ... + 495440.

Almost surely, 2^998749610 is an apocalyptic number.

998749610 is a deficient number, since it is larger than the sum of its proper divisors (816801022).

998749610 is a wasteful number, since it uses less digits than its factorization.

998749610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988969.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 998749610 is about 31603.0000158213. Note that the first 4 decimals coincide. The cubic root of 998749610 is about 999.5830294931.

The spelling of 998749610 in words is "nine hundred ninety-eight million, seven hundred forty-nine thousand, six hundred ten".