83309390 has 16 divisors (see below), whose sum is σ = 150415920. Its totient is φ = 33221760.

The previous prime is 83309389. The next prime is 83309399. The reversal of 83309390 is 9390338.

It is a self number, because there is not a number n which added to its sum of digits gives 83309390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83309399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9275 + ... + 15894.

It is an arithmetic number, because the mean of its divisors is an integer number (9400995).

Almost surely, 2^83309390 is an apocalyptic number.

83309390 is a deficient number, since it is larger than the sum of its proper divisors (67106530).

83309390 is a wasteful number, since it uses less digits than its factorization.

83309390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25507.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 83309390 is about 9127.3977671623. The cubic root of 83309390 is about 436.7483955045.

The spelling of 83309390 in words is "eighty-three million, three hundred nine thousand, three hundred ninety".