85780351 has 4 divisors (see below), whose sum is σ = 90826272. Its totient is φ = 80734432.

The previous prime is 85780339. The next prime is 85780367. The reversal of 85780351 is 15308758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15308758 = 2 ⋅7654379.

It is a cyclic number.

It is not a de Polignac number, because 85780351 - 2⁷ = 85780223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85780351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85780381) 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, 2522935 + ... + 2522968.

It is an arithmetic number, because the mean of its divisors is an integer number (22706568).

Almost surely, 2^85780351 is an apocalyptic number.

85780351 is a deficient number, since it is larger than the sum of its proper divisors (5045921).

85780351 is a wasteful number, since it uses less digits than its factorization.

85780351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045920.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 85780351 is about 9261.7682436995. The cubic root of 85780351 is about 441.0243883517.

The spelling of 85780351 in words is "eighty-five million, seven hundred eighty thousand, three hundred fifty-one".