77150897 has 4 divisors (see below), whose sum is σ = 77339940. Its totient is φ = 76961856.

The previous prime is 77150869. The next prime is 77150917. The reversal of 77150897 is 79805177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79805177 = 487 ⋅163871.

It can be written as a sum of positive squares in 2 ways, for example, as 52983841 + 24167056 = 7279^2 + 4916^2 .

It is a cyclic number.

It is not a de Polignac number, because 77150897 - 2⁶ = 77150833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77150837) 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, 93908 + ... + 94725.

It is an arithmetic number, because the mean of its divisors is an integer number (19334985).

Almost surely, 2^77150897 is an apocalyptic number.

It is an amenable number.

77150897 is a deficient number, since it is larger than the sum of its proper divisors (189043).

77150897 is a wasteful number, since it uses less digits than its factorization.

77150897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189042.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 77150897 is about 8783.5583336140. The cubic root of 77150897 is about 425.7098117751.

The spelling of 77150897 in words is "seventy-seven million, one hundred fifty thousand, eight hundred ninety-seven".