77172061 has 8 divisors (see below), whose sum is σ = 85264704. Its totient is φ = 69474240.

The previous prime is 77172041. The next prime is 77172071. The reversal of 77172061 is 16027177.

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

It is not a de Polignac number, because 77172061 - 2¹¹ = 77170013 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 (77172031) 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, 98295 + ... + 99076.

It is an arithmetic number, because the mean of its divisors is an integer number (10658088).

Almost surely, 2^77172061 is an apocalyptic number.

It is an amenable number.

77172061 is a deficient number, since it is larger than the sum of its proper divisors (8092643).

77172061 is a wasteful number, since it uses less digits than its factorization.

77172061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197411.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 77172061 is about 8784.7630019255. The cubic root of 77172061 is about 425.7487350587.

The spelling of 77172061 in words is "seventy-seven million, one hundred seventy-two thousand, sixty-one".