1471798981 has 4 divisors (see below), whose sum is σ = 1522550700. Its totient is φ = 1421047264.

The previous prime is 1471798931. The next prime is 1471799009. The reversal of 1471798981 is 1898971741.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 888576481 + 583222500 = 29809^2 + 24150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1471798981 - 2¹⁷ = 1471667909 is a prime.

It is a super-2 number, since 2×1471798981² = 4332384480945276722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1471798921) 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, 25375816 + ... + 25375873.

It is an arithmetic number, because the mean of its divisors is an integer number (380637675).

Almost surely, 2^1471798981 is an apocalyptic number.

It is an amenable number.

1471798981 is a deficient number, since it is larger than the sum of its proper divisors (50751719).

1471798981 is an equidigital number, since it uses as much as digits as its factorization.

1471798981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50751718.

The product of its digits is 1016064, while the sum is 55.

The square root of 1471798981 is about 38364.0323871201. The cubic root of 1471798981 is about 1137.4950077630.

The spelling of 1471798981 in words is "one billion, four hundred seventy-one million, seven hundred ninety-eight thousand, nine hundred eighty-one".