77914069 has 2 divisors, whose sum is σ = 77914070. Its totient is φ = 77914068.

The previous prime is 77914061. The next prime is 77914093. The reversal of 77914069 is 96041977.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 5579044 = 8505^2 + 2362^2 .

It is a cyclic number.

It is not a de Polignac number, because 77914069 - 2³ = 77914061 is a prime.

It is a super-2 number, since 2×77914069² = 12141204296273522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77914061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38957034 + 38957035.

It is an arithmetic number, because the mean of its divisors is an integer number (38957035).

Almost surely, 2^77914069 is an apocalyptic number.

It is an amenable number.

77914069 is a deficient number, since it is larger than the sum of its proper divisors (1).

77914069 is an equidigital number, since it uses as much as digits as its factorization.

77914069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 77914069 is about 8826.8946408122. The cubic root of 77914069 is about 427.1089071679.

The spelling of 77914069 in words is "seventy-seven million, nine hundred fourteen thousand, sixty-nine".