83406578 has 4 divisors (see below), whose sum is σ = 125109870. Its totient is φ = 41703288.

The previous prime is 83406569. The next prime is 83406601. The reversal of 83406578 is 87560438.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81775849 + 1630729 = 9043^2 + 1277^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20851643 + ... + 20851646.

Almost surely, 2^83406578 is an apocalyptic number.

83406578 is a deficient number, since it is larger than the sum of its proper divisors (41703292).

83406578 is a wasteful number, since it uses less digits than its factorization.

83406578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41703291.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 83406578 is about 9132.7201862315. The cubic root of 83406578 is about 436.9181651138.

The spelling of 83406578 in words is "eighty-three million, four hundred six thousand, five hundred seventy-eight".