85779401 has 4 divisors (see below), whose sum is σ = 86628804. Its totient is φ = 84930000.

The previous prime is 85779389. The next prime is 85779409. The reversal of 85779401 is 10497758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10497758 = 2 ⋅5248879.

It can be written as a sum of positive squares in 2 ways, for example, as 78783376 + 6996025 = 8876^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 85779401 - 2¹⁰ = 85778377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85779409) 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, 424550 + ... + 424751.

It is an arithmetic number, because the mean of its divisors is an integer number (21657201).

Almost surely, 2^85779401 is an apocalyptic number.

It is an amenable number.

85779401 is a deficient number, since it is larger than the sum of its proper divisors (849403).

85779401 is a wasteful number, since it uses less digits than its factorization.

85779401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849402.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 85779401 is about 9261.7169574545. The cubic root of 85779401 is about 441.0227602604.

The spelling of 85779401 in words is "eighty-five million, seven hundred seventy-nine thousand, four hundred one".