83073981 has 4 divisors (see below), whose sum is σ = 110765312. Its totient is φ = 55382652.

The previous prime is 83073959. The next prime is 83073989. The reversal of 83073981 is 18937038.

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 not a de Polignac number, because 83073981 - 2⁷ = 83073853 is a prime.

It is a super-2 number, since 2×83073981² = 13802572638376722, 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 (83073989) 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, 13845661 + ... + 13845666.

It is an arithmetic number, because the mean of its divisors is an integer number (27691328).

Almost surely, 2^83073981 is an apocalyptic number.

It is an amenable number.

83073981 is a deficient number, since it is larger than the sum of its proper divisors (27691331).

83073981 is a wasteful number, since it uses less digits than its factorization.

83073981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27691330.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 83073981 is about 9114.4929096467. The cubic root of 83073981 is about 436.3366312083.

The spelling of 83073981 in words is "eighty-three million, seventy-three thousand, nine hundred eighty-one".