77172146 has 8 divisors (see below), whose sum is σ = 122567580. Its totient is φ = 36316288.

The previous prime is 77172089. The next prime is 77172149. The reversal of 77172146 is 64127177.

It can be written as a sum of positive squares in 2 ways, for example, as 76825225 + 346921 = 8765^2 + 589^2 .

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

It is not an unprimeable number, because it can be changed into a prime (77172149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1134851 + ... + 1134918.

Almost surely, 2^77172146 is an apocalyptic number.

77172146 is a deficient number, since it is larger than the sum of its proper divisors (45395434).

77172146 is a wasteful number, since it uses less digits than its factorization.

77172146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269788.

The product of its digits is 16464, while the sum is 35.

The square root of 77172146 is about 8784.7678398464. The cubic root of 77172146 is about 425.7488913701.

The spelling of 77172146 in words is "seventy-seven million, one hundred seventy-two thousand, one hundred forty-six".