77070797 has 4 divisors (see below), whose sum is σ = 77228256. Its totient is φ = 76913340.

The previous prime is 77070793. The next prime is 77070811. The reversal of 77070797 is 79707077.

It is a happy number.

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: 79707077 = 3803 ⋅20959.

It is a cyclic number.

It is not a de Polignac number, because 77070797 - 2² = 77070793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77070793) 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, 77993 + ... + 78974.

It is an arithmetic number, because the mean of its divisors is an integer number (19307064).

Almost surely, 2^77070797 is an apocalyptic number.

It is an amenable number.

77070797 is a deficient number, since it is larger than the sum of its proper divisors (157459).

77070797 is a wasteful number, since it uses less digits than its factorization.

77070797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157458.

The product of its (nonzero) digits is 151263, while the sum is 44.

The square root of 77070797 is about 8778.9974940195. The cubic root of 77070797 is about 425.5624332178.

Adding to 77070797 its sum of digits (44), we get a square (77070841 = 8779²).

The spelling of 77070797 in words is "seventy-seven million, seventy thousand, seven hundred ninety-seven".