85400477 has 4 divisors (see below), whose sum is σ = 87708636. Its totient is φ = 83092320.

The previous prime is 85400453. The next prime is 85400479. The reversal of 85400477 is 77400458.

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 2 ways, for example, as 72012196 + 13388281 = 8486^2 + 3659^2 .

It is a cyclic number.

It is not a de Polignac number, because 85400477 - 2⁸ = 85400221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85400479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1154024 + ... + 1154097.

It is an arithmetic number, because the mean of its divisors is an integer number (21927159).

Almost surely, 2^85400477 is an apocalyptic number.

It is an amenable number.

85400477 is a deficient number, since it is larger than the sum of its proper divisors (2308159).

85400477 is a wasteful number, since it uses less digits than its factorization.

85400477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308158.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 85400477 is about 9241.2378499852. The cubic root of 85400477 is about 440.3724068211.

The spelling of 85400477 in words is "eighty-five million, four hundred thousand, four hundred seventy-seven".