77830073 has 4 divisors (see below), whose sum is σ = 79486080. Its totient is φ = 76174068.

The previous prime is 77830069. The next prime is 77830079. The reversal of 77830073 is 37003877.

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: 37003877 = 1013 ⋅36529.

It is a cyclic number.

It is not a de Polignac number, because 77830073 - 2² = 77830069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77830079) 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, 827933 + ... + 828026.

It is an arithmetic number, because the mean of its divisors is an integer number (19871520).

Almost surely, 2^77830073 is an apocalyptic number.

It is an amenable number.

77830073 is a deficient number, since it is larger than the sum of its proper divisors (1656007).

77830073 is a wasteful number, since it uses less digits than its factorization.

77830073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656006.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 77830073 is about 8822.1353990970. The cubic root of 77830073 is about 426.9553690461.

The spelling of 77830073 in words is "seventy-seven million, eight hundred thirty thousand, seventy-three".