75677209 has 4 divisors (see below), whose sum is σ = 79660240. Its totient is φ = 71694180.

The previous prime is 75677201. The next prime is 75677213. The reversal of 75677209 is 90277657.

It is a happy number.

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: 90277657 = 137 ⋅658961.

It is a cyclic number.

It is not a de Polignac number, because 75677209 - 2³ = 75677201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75677201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1991487 + ... + 1991524.

It is an arithmetic number, because the mean of its divisors is an integer number (19915060).

Almost surely, 2^75677209 is an apocalyptic number.

It is an amenable number.

75677209 is a deficient number, since it is larger than the sum of its proper divisors (3983031).

75677209 is a wasteful number, since it uses less digits than its factorization.

75677209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983030.

The product of its (nonzero) digits is 185220, while the sum is 43.

The square root of 75677209 is about 8699.2648539977. The cubic root of 75677209 is about 422.9818206861.

The spelling of 75677209 in words is "seventy-five million, six hundred seventy-seven thousand, two hundred nine".