77698073 has 4 divisors (see below), whose sum is σ = 77719248. Its totient is φ = 77676900.

The previous prime is 77698037. The next prime is 77698099. The reversal of 77698073 is 37089677.

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: 37089677 = 151 ⋅245627.

It is a cyclic number.

It is not a de Polignac number, because 77698073 - 2¹⁰ = 77697049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77698013) 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, 3503 + ... + 12948.

It is an arithmetic number, because the mean of its divisors is an integer number (19429812).

Almost surely, 2^77698073 is an apocalyptic number.

It is an amenable number.

77698073 is a deficient number, since it is larger than the sum of its proper divisors (21175).

77698073 is a wasteful number, since it uses less digits than its factorization.

77698073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21174.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 77698073 is about 8814.6510424406. The cubic root of 77698073 is about 426.7138600006.

The spelling of 77698073 in words is "seventy-seven million, six hundred ninety-eight thousand, seventy-three".