76621217 has 2 divisors, whose sum is σ = 76621218. Its totient is φ = 76621216.

The previous prime is 76621213. The next prime is 76621241. The reversal of 76621217 is 71212667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59613841 + 17007376 = 7721^2 + 4124^2 .

It is an emirp because it is prime and its reverse (71212667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76621217 - 2² = 76621213 is a prime.

It is a super-2 number, since 2×76621217² = 11741621789122178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76621213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38310608 + 38310609.

It is an arithmetic number, because the mean of its divisors is an integer number (38310609).

Almost surely, 2^76621217 is an apocalyptic number.

It is an amenable number.

76621217 is a deficient number, since it is larger than the sum of its proper divisors (1).

76621217 is an equidigital number, since it uses as much as digits as its factorization.

76621217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 76621217 is about 8753.3546140894. The cubic root of 76621217 is about 424.7333358321.

The spelling of 76621217 in words is "seventy-six million, six hundred twenty-one thousand, two hundred seventeen".