83420145 has 64 divisors (see below), whose sum is σ = 153964800. Its totient is φ = 42831360.

The previous prime is 83420143. The next prime is 83420147. The reversal of 83420145 is 54102438.

It is an interprime number because it is at equal distance from previous prime (83420143) and next prime (83420147).

It is not a de Polignac number, because 83420145 - 2¹ = 83420143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (83420143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 636730 + ... + 636860.

It is an arithmetic number, because the mean of its divisors is an integer number (2405700).

Almost surely, 2^83420145 is an apocalyptic number.

It is an amenable number.

83420145 is a deficient number, since it is larger than the sum of its proper divisors (70544655).

83420145 is a wasteful number, since it uses less digits than its factorization.

83420145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 83420145 is about 9133.4629248714. The cubic root of 83420145 is about 436.9418536826.

The spelling of 83420145 in words is "eighty-three million, four hundred twenty thousand, one hundred forty-five".