77541969 has 8 divisors (see below), whose sum is σ = 106954560. Its totient is φ = 49912016.

The previous prime is 77541953. The next prime is 77541979. The reversal of 77541969 is 96914577.

It is a happy number.

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

It is not a de Polignac number, because 77541969 - 2⁴ = 77541953 is a prime.

It is a super-2 number, since 2×77541969² = 12025513912793922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77541929) 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 7 ways as a sum of consecutive naturals, for example, 445557 + ... + 445730.

It is an arithmetic number, because the mean of its divisors is an integer number (13369320).

Almost surely, 2^77541969 is an apocalyptic number.

It is an amenable number.

77541969 is a deficient number, since it is larger than the sum of its proper divisors (29412591).

77541969 is a wasteful number, since it uses less digits than its factorization.

77541969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891319.

The product of its digits is 476280, while the sum is 48.

The square root of 77541969 is about 8805.7917872273. The cubic root of 77541969 is about 426.4278966650.

The spelling of 77541969 in words is "seventy-seven million, five hundred forty-one thousand, nine hundred sixty-nine".