1485886981 has 4 divisors (see below), whose sum is σ = 1486138752. Its totient is φ = 1485635212.

The previous prime is 1485886979. The next prime is 1485886993. The reversal of 1485886981 is 1896885841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1485886981 - 2¹ = 1485886979 is a prime.

It is a super-2 number, since 2×1485886981² = 4415720240610588722, 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 (1485886931) 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, 116815 + ... + 128908.

It is an arithmetic number, because the mean of its divisors is an integer number (371534688).

Almost surely, 2^1485886981 is an apocalyptic number.

It is an amenable number.

1485886981 is a deficient number, since it is larger than the sum of its proper divisors (251771).

1485886981 is an equidigital number, since it uses as much as digits as its factorization.

1485886981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251770.

The product of its digits is 4423680, while the sum is 58.

The square root of 1485886981 is about 38547.2045808772. The cubic root of 1485886981 is about 1141.1128409364.

The spelling of 1485886981 in words is "one billion, four hundred eighty-five million, eight hundred eighty-six thousand, nine hundred eighty-one".