77147401 has 4 divisors (see below), whose sum is σ = 77209092. Its totient is φ = 77085712.

The previous prime is 77147381. The next prime is 77147417. The reversal of 77147401 is 10474177.

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 60140025 + 17007376 = 7755^2 + 4124^2 .

It is a cyclic number.

It is not a de Polignac number, because 77147401 - 2¹¹ = 77145353 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77147431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28930 + ... + 31483.

It is an arithmetic number, because the mean of its divisors is an integer number (19302273).

Almost surely, 2^77147401 is an apocalyptic number.

It is an amenable number.

77147401 is a deficient number, since it is larger than the sum of its proper divisors (61691).

77147401 is a wasteful number, since it uses less digits than its factorization.

77147401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61690.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 77147401 is about 8783.3593231747. The cubic root of 77147401 is about 425.7033815021.

The spelling of 77147401 in words is "seventy-seven million, one hundred forty-seven thousand, four hundred one".