1988971475 has 12 divisors (see below), whose sum is σ = 2467008024. Its totient is φ = 1590736320.

The previous prime is 1988971469. The next prime is 1988971489. The reversal of 1988971475 is 5741798891.

It is not a de Polignac number, because 1988971475 - 2²⁶ = 1921862611 is a prime.

It is a super-3 number, since 3×1988971475³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104927 + ... + 122423.

It is an arithmetic number, because the mean of its divisors is an integer number (205584002).

Almost surely, 2^1988971475 is an apocalyptic number.

1988971475 is a deficient number, since it is larger than the sum of its proper divisors (478036549).

1988971475 is a wasteful number, since it uses less digits than its factorization.

1988971475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22054 (or 22049 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 59.

The square root of 1988971475 is about 44597.8864409514. The cubic root of 1988971475 is about 1257.6009349476.

The spelling of 1988971475 in words is "one billion, nine hundred eighty-eight million, nine hundred seventy-one thousand, four hundred seventy-five".