76640173 has 4 divisors (see below), whose sum is σ = 78086268. Its totient is φ = 75194080.

The previous prime is 76640171. The next prime is 76640197. The reversal of 76640173 is 37104667.

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 65966884 + 10673289 = 8122^2 + 3267^2 .

It is a cyclic number.

It is not a de Polignac number, because 76640173 - 2¹ = 76640171 is a prime.

It is a super-2 number, since 2×76640173² = 11747432234939858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76640171) 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, 722968 + ... + 723073.

It is an arithmetic number, because the mean of its divisors is an integer number (19521567).

Almost surely, 2^76640173 is an apocalyptic number.

It is an amenable number.

76640173 is a deficient number, since it is larger than the sum of its proper divisors (1446095).

76640173 is a wasteful number, since it uses less digits than its factorization.

76640173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446094.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 76640173 is about 8754.4373320048. The cubic root of 76640173 is about 424.7683591218.

The spelling of 76640173 in words is "seventy-six million, six hundred forty thousand, one hundred seventy-three".