85402477 has 4 divisors (see below), whose sum is σ = 88347420. Its totient is φ = 82457536.

The previous prime is 85402463. The next prime is 85402487. The reversal of 85402477 is 77420458.

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 26512201 + 58890276 = 5149^2 + 7674^2 .

It is a cyclic number.

It is not a de Polignac number, because 85402477 - 2¹¹ = 85400429 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 (85402417) 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, 1472428 + ... + 1472485.

It is an arithmetic number, because the mean of its divisors is an integer number (22086855).

Almost surely, 2^85402477 is an apocalyptic number.

It is an amenable number.

85402477 is a deficient number, since it is larger than the sum of its proper divisors (2944943).

85402477 is a wasteful number, since it uses less digits than its factorization.

85402477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944942.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 85402477 is about 9241.3460599633. The cubic root of 85402477 is about 440.3758444988.

The spelling of 85402477 in words is "eighty-five million, four hundred two thousand, four hundred seventy-seven".