77266213 has 2 divisors, whose sum is σ = 77266214. Its totient is φ = 77266212.

The previous prime is 77266183. The next prime is 77266243. The reversal of 77266213 is 31266277.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (77266183) and next prime (77266243).

It can be written as a sum of positive squares in only one way, i.e., 71199844 + 6066369 = 8438^2 + 2463^2 .

It is a cyclic number.

It is not a de Polignac number, because 77266213 - 2¹³ = 77258021 is a prime.

It is a super-2 number, since 2×77266213² = 11940135342722738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77266243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38633106 + 38633107.

It is an arithmetic number, because the mean of its divisors is an integer number (38633107).

Almost surely, 2^77266213 is an apocalyptic number.

It is an amenable number.

77266213 is a deficient number, since it is larger than the sum of its proper divisors (1).

77266213 is an equidigital number, since it uses as much as digits as its factorization.

77266213 is an odious number, because the sum of its binary digits is odd.

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

The square root of 77266213 is about 8790.1201925798. The cubic root of 77266213 is about 425.9218063481.

The spelling of 77266213 in words is "seventy-seven million, two hundred sixty-six thousand, two hundred thirteen".