77475955 has 4 divisors (see below), whose sum is σ = 92971152. Its totient is φ = 61980760.

The previous prime is 77475949. The next prime is 77475961. The reversal of 77475955 is 55957477.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (77475949) and next prime (77475961).

It is not a de Polignac number, because 77475955 - 2³ = 77475947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77475899 and 77475908.

It is an unprimeable number.

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, 7747591 + ... + 7747600.

It is an arithmetic number, because the mean of its divisors is an integer number (23242788).

Almost surely, 2^77475955 is an apocalyptic number.

77475955 is a deficient number, since it is larger than the sum of its proper divisors (15495197).

77475955 is a wasteful number, since it uses less digits than its factorization.

77475955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15495196.

The product of its digits is 1543500, while the sum is 49.

The square root of 77475955 is about 8802.0426606555. The cubic root of 77475955 is about 426.3068516631.

It can be divided in two parts, 774 and 75955, that added together give a square (76729 = 277²).

The spelling of 77475955 in words is "seventy-seven million, four hundred seventy-five thousand, nine hundred fifty-five".