182121397 has 4 divisors (see below), whose sum is σ = 182159296. Its totient is φ = 182083500.

The previous prime is 182121389. The next prime is 182121431. The reversal of 182121397 is 793121281.

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, and also an emirpimes, since its reverse is a distinct semiprime: 793121281 = 17 ⋅46654193.

It is a cyclic number.

It is not a de Polignac number, because 182121397 - 2³ = 182121389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182121097) 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, 10479 + ... + 21772.

It is an arithmetic number, because the mean of its divisors is an integer number (45539824).

Almost surely, 2^182121397 is an apocalyptic number.

It is an amenable number.

182121397 is a deficient number, since it is larger than the sum of its proper divisors (37899).

182121397 is an equidigital number, since it uses as much as digits as its factorization.

182121397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37898.

The product of its digits is 6048, while the sum is 34.

The square root of 182121397 is about 13495.2360853747. The cubic root of 182121397 is about 566.8310833553.

The spelling of 182121397 in words is "one hundred eighty-two million, one hundred twenty-one thousand, three hundred ninety-seven".