1473661981 has 16 divisors (see below), whose sum is σ = 1620499968. Its totient is φ = 1329015600.

The previous prime is 1473661963. The next prime is 1473661991. The reversal of 1473661981 is 1891663741.

It is a de Polignac number, because none of the positive numbers 2^k-1473661981 is a prime.

It is a super-2 number, since 2×1473661981² = 4343359268489688722, 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 (1473661961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 825616 + ... + 827398.

It is an arithmetic number, because the mean of its divisors is an integer number (101281248).

Almost surely, 2^1473661981 is an apocalyptic number.

1473661981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1473661981 is a deficient number, since it is larger than the sum of its proper divisors (146837987).

1473661981 is a wasteful number, since it uses less digits than its factorization.

1473661981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352.

The product of its digits is 217728, while the sum is 46.

The square root of 1473661981 is about 38388.3052634523. The cubic root of 1473661981 is about 1137.9747516490.

The spelling of 1473661981 in words is "one billion, four hundred seventy-three million, six hundred sixty-one thousand, nine hundred eighty-one".