73779887 has 4 divisors (see below), whose sum is σ = 75773976. Its totient is φ = 71785800.

The previous prime is 73779877. The next prime is 73779889. The reversal of 73779887 is 78897737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78897737 = 347 ⋅227371.

It is a cyclic number.

It is not a de Polignac number, because 73779887 - 2⁸ = 73779631 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 (73779889) 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, 996989 + ... + 997062.

It is an arithmetic number, because the mean of its divisors is an integer number (18943494).

Almost surely, 2^73779887 is an apocalyptic number.

73779887 is a deficient number, since it is larger than the sum of its proper divisors (1994089).

73779887 is a wasteful number, since it uses less digits than its factorization.

73779887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994088.

The product of its digits is 4148928, while the sum is 56.

The square root of 73779887 is about 8589.5219308178. The cubic root of 73779887 is about 419.4169669113.

The spelling of 73779887 in words is "seventy-three million, seven hundred seventy-nine thousand, eight hundred eighty-seven".