83402505 has 24 divisors (see below), whose sum is σ = 144912768. Its totient is φ = 44374176.

The previous prime is 83402503. The next prime is 83402507. The reversal of 83402505 is 50520438.

It is an interprime number because it is at equal distance from previous prime (83402503) and next prime (83402507).

It is not a de Polignac number, because 83402505 - 2¹ = 83402503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83402503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18834 + ... + 22836.

It is an arithmetic number, because the mean of its divisors is an integer number (6038032).

Almost surely, 2^83402505 is an apocalyptic number.

It is an amenable number.

83402505 is a deficient number, since it is larger than the sum of its proper divisors (61510263).

83402505 is a wasteful number, since it uses less digits than its factorization.

83402505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477 (or 4474 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 83402505 is about 9132.4971940866. The cubic root of 83402505 is about 436.9110529783.

The spelling of 83402505 in words is "eighty-three million, four hundred two thousand, five hundred five".