83404387 has 8 divisors (see below), whose sum is σ = 91265472. Its totient is φ = 75589800.

The previous prime is 83404361. The next prime is 83404393. The reversal of 83404387 is 78340438.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83404387 - 2⁷ = 83404259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83404337) 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, 7813 + ... + 15094.

It is an arithmetic number, because the mean of its divisors is an integer number (11408184).

Almost surely, 2^83404387 is an apocalyptic number.

83404387 is a deficient number, since it is larger than the sum of its proper divisors (7861085).

83404387 is a wasteful number, since it uses less digits than its factorization.

83404387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23249.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 83404387 is about 9132.6002321354. The cubic root of 83404387 is about 436.9143392921.

The spelling of 83404387 in words is "eighty-three million, four hundred four thousand, three hundred eighty-seven".