1981036977 has 8 divisors (see below), whose sum is σ = 2642433120. Its totient is φ = 1320166080.

The previous prime is 1981036969. The next prime is 1981036987. The reversal of 1981036977 is 7796301891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1981036977 - 2³ = 1981036969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1981036907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122424 + ... + 137657.

It is an arithmetic number, because the mean of its divisors is an integer number (330304140).

Almost surely, 2^1981036977 is an apocalyptic number.

It is an amenable number.

1981036977 is a deficient number, since it is larger than the sum of its proper divisors (661396143).

1981036977 is a wasteful number, since it uses less digits than its factorization.

1981036977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262623.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 1981036977 is about 44508.8415598519. The cubic root of 1981036977 is about 1255.9264127932.

The spelling of 1981036977 in words is "one billion, nine hundred eighty-one million, thirty-six thousand, nine hundred seventy-seven".