77214109 has 4 divisors (see below), whose sum is σ = 88244704. Its totient is φ = 66183516.

The previous prime is 77214107. The next prime is 77214113. The reversal of 77214109 is 90141277.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90141277 = 881 ⋅102317.

It is not a de Polignac number, because 77214109 - 2¹ = 77214107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77214107) 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, 5515287 + ... + 5515300.

It is an arithmetic number, because the mean of its divisors is an integer number (22061176).

Almost surely, 2^77214109 is an apocalyptic number.

It is an amenable number.

77214109 is a deficient number, since it is larger than the sum of its proper divisors (11030595).

77214109 is a wasteful number, since it uses less digits than its factorization.

77214109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11030594.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 77214109 is about 8787.1559107597. The cubic root of 77214109 is about 425.8260455612.

The spelling of 77214109 in words is "seventy-seven million, two hundred fourteen thousand, one hundred nine".