83938145 has 4 divisors (see below), whose sum is σ = 100725780. Its totient is φ = 67150512.

The previous prime is 83938133. The next prime is 83938147. The reversal of 83938145 is 54183938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54183938 = 2 ⋅27091969.

It can be written as a sum of positive squares in 2 ways, for example, as 13897984 + 70040161 = 3728^2 + 8369^2 .

It is a cyclic number.

It is not a de Polignac number, because 83938145 - 2⁶ = 83938081 is a prime.

It is a super-2 number, since 2×83938145² = 14091224372082050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83938147) 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, 8393810 + ... + 8393819.

It is an arithmetic number, because the mean of its divisors is an integer number (25181445).

Almost surely, 2^83938145 is an apocalyptic number.

It is an amenable number.

83938145 is a deficient number, since it is larger than the sum of its proper divisors (16787635).

83938145 is a wasteful number, since it uses less digits than its factorization.

83938145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16787634.

The product of its digits is 103680, while the sum is 41.

The square root of 83938145 is about 9161.7763015695. The cubic root of 83938145 is about 437.8443895140.

The spelling of 83938145 in words is "eighty-three million, nine hundred thirty-eight thousand, one hundred forty-five".