77970345 has 16 divisors (see below), whose sum is σ = 130177152. Its totient is φ = 39776000.

The previous prime is 77970341. The next prime is 77970353. The reversal of 77970345 is 54307977.

It is not a de Polignac number, because 77970345 - 2² = 77970341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77970297 and 77970306.

It is not an unprimeable number, because it can be changed into a prime (77970341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112656 + ... + 113345.

It is an arithmetic number, because the mean of its divisors is an integer number (8136072).

Almost surely, 2^77970345 is an apocalyptic number.

It is an amenable number.

77970345 is a deficient number, since it is larger than the sum of its proper divisors (52206807).

77970345 is a wasteful number, since it uses less digits than its factorization.

77970345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226032.

The product of its (nonzero) digits is 185220, while the sum is 42.

The square root of 77970345 is about 8830.0818229505. The cubic root of 77970345 is about 427.2117135740.

The spelling of 77970345 in words is "seventy-seven million, nine hundred seventy thousand, three hundred forty-five".