92173981 has 4 divisors (see below), whose sum is σ = 92210464. Its totient is φ = 92137500.

The previous prime is 92173969. The next prime is 92173999. The reversal of 92173981 is 18937129.

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 92173981 - 2⁷ = 92173853 is a prime.

It is a super-2 number, since 2×92173981² = 16992085546776722, 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 (92173931) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14145 + ... + 19606.

It is an arithmetic number, because the mean of its divisors is an integer number (23052616).

Almost surely, 2^92173981 is an apocalyptic number.

It is an amenable number.

92173981 is a deficient number, since it is larger than the sum of its proper divisors (36483).

92173981 is a wasteful number, since it uses less digits than its factorization.

92173981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36482.

The product of its digits is 27216, while the sum is 40.

The square root of 92173981 is about 9600.7281494687. The cubic root of 92173981 is about 451.7201340703.

The spelling of 92173981 in words is "ninety-two million, one hundred seventy-three thousand, nine hundred eighty-one".