1988279101 has 16 divisors (see below), whose sum is σ = 2077280640. Its totient is φ = 1901309760.

The previous prime is 1988279099. The next prime is 1988279113. The reversal of 1988279101 is 1019728891.

It is a cyclic number.

It is not a de Polignac number, because 1988279101 - 2¹ = 1988279099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988279191) 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, 994635 + ... + 996631.

It is an arithmetic number, because the mean of its divisors is an integer number (129830040).

Almost surely, 2^1988279101 is an apocalyptic number.

It is an amenable number.

1988279101 is a deficient number, since it is larger than the sum of its proper divisors (89001539).

1988279101 is a wasteful number, since it uses less digits than its factorization.

1988279101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484.

The product of its (nonzero) digits is 72576, while the sum is 46.

The square root of 1988279101 is about 44590.1233570844. The cubic root of 1988279101 is about 1257.4549916370.

The spelling of 1988279101 in words is "one billion, nine hundred eighty-eight million, two hundred seventy-nine thousand, one hundred one".