76521953 has 4 divisors (see below), whose sum is σ = 76856340. Its totient is φ = 76187568.

The previous prime is 76521941. The next prime is 76521959. The reversal of 76521953 is 35912567.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50225569 + 26296384 = 7087^2 + 5128^2 .

It is a cyclic number.

It is not a de Polignac number, because 76521953 - 2⁴ = 76521937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76521959) 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, 166850 + ... + 167307.

It is an arithmetic number, because the mean of its divisors is an integer number (19214085).

Almost surely, 2^76521953 is an apocalyptic number.

It is an amenable number.

76521953 is a deficient number, since it is larger than the sum of its proper divisors (334387).

76521953 is a wasteful number, since it uses less digits than its factorization.

76521953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334386.

The product of its digits is 56700, while the sum is 38.

The square root of 76521953 is about 8747.6827217269. The cubic root of 76521953 is about 424.5498403146.

The spelling of 76521953 in words is "seventy-six million, five hundred twenty-one thousand, nine hundred fifty-three".