77541907 has 4 divisors (see below), whose sum is σ = 81623080. Its totient is φ = 73460736.

The previous prime is 77541883. The next prime is 77541917. The reversal of 77541907 is 70914577.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77541907 - 2¹⁵ = 77509139 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 77541907.

It is not an unprimeable number, because it can be changed into a prime (77541917) 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, 2040558 + ... + 2040595.

It is an arithmetic number, because the mean of its divisors is an integer number (20405770).

Almost surely, 2^77541907 is an apocalyptic number.

77541907 is a deficient number, since it is larger than the sum of its proper divisors (4081173).

77541907 is a wasteful number, since it uses less digits than its factorization.

77541907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081172.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 77541907 is about 8805.7882668163. The cubic root of 77541907 is about 426.4277830124.

The spelling of 77541907 in words is "seventy-seven million, five hundred forty-one thousand, nine hundred seven".