988961111 has 4 divisors (see below), whose sum is σ = 1047135312. Its totient is φ = 930786912.

The previous prime is 988961087. The next prime is 988961117. The reversal of 988961111 is 111169889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111169889 = 743 ⋅149623.

It is a cyclic number.

It is not a de Polignac number, because 988961111 - 2⁶ = 988961047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988961117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29087075 + ... + 29087108.

It is an arithmetic number, because the mean of its divisors is an integer number (261783828).

Almost surely, 2^988961111 is an apocalyptic number.

988961111 is a deficient number, since it is larger than the sum of its proper divisors (58174201).

988961111 is a wasteful number, since it uses less digits than its factorization.

988961111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58174200.

The product of its digits is 31104, while the sum is 44.

The square root of 988961111 is about 31447.7520818261. The cubic root of 988961111 is about 996.3067470078.

The spelling of 988961111 in words is "nine hundred eighty-eight million, nine hundred sixty-one thousand, one hundred eleven".