75697812 has 18 divisors (see below), whose sum is σ = 191347338. Its totient is φ = 25232592.

The previous prime is 75697799. The next prime is 75697813. The reversal of 75697812 is 21879657.

75697812 is a `hidden beast` number, since 7 + 569 + 7 + 81 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43480836 + 32216976 = 6594^2 + 5676^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75697813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1051323 + ... + 1051394.

Almost surely, 2^75697812 is an apocalyptic number.

It is an amenable number.

75697812 is an abundant number, since it is smaller than the sum of its proper divisors (115649526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75697812 is a wasteful number, since it uses less digits than its factorization.

75697812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102727 (or 2102722 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 75697812 is about 8700.4489539334. The cubic root of 75697812 is about 423.0202025795.

The spelling of 75697812 in words is "seventy-five million, six hundred ninety-seven thousand, eight hundred twelve".