76971281 has 4 divisors (see below), whose sum is σ = 77374464. Its totient is φ = 76568100.

The previous prime is 76971263. The next prime is 76971283. The reversal of 76971281 is 18217967.

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: 18217967 = 3917 ⋅4651.

It is a cyclic number.

It is not a de Polignac number, because 76971281 - 2²⁶ = 9862417 is a prime.

It is a super-2 number, since 2×76971281² = 11849156197561922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76971283) 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, 201305 + ... + 201686.

It is an arithmetic number, because the mean of its divisors is an integer number (19343616).

Almost surely, 2^76971281 is an apocalyptic number.

It is an amenable number.

76971281 is a deficient number, since it is larger than the sum of its proper divisors (403183).

76971281 is a wasteful number, since it uses less digits than its factorization.

76971281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403182.

The product of its digits is 42336, while the sum is 41.

The square root of 76971281 is about 8773.3278178807. The cubic root of 76971281 is about 425.3791882284.

The spelling of 76971281 in words is "seventy-six million, nine hundred seventy-one thousand, two hundred eighty-one".