77801901 has 8 divisors (see below), whose sum is σ = 105436704. Its totient is φ = 51017520.

The previous prime is 77801897. The next prime is 77801917. The reversal of 77801901 is 10910877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77801901 - 2² = 77801897 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77801951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212391 + ... + 212756.

It is an arithmetic number, because the mean of its divisors is an integer number (13179588).

Almost surely, 2^77801901 is an apocalyptic number.

It is an amenable number.

77801901 is a deficient number, since it is larger than the sum of its proper divisors (27634803).

77801901 is a wasteful number, since it uses less digits than its factorization.

77801901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425211.

The product of its (nonzero) digits is 3528, while the sum is 33.

The square root of 77801901 is about 8820.5385889978. The cubic root of 77801901 is about 426.9038480947.

The spelling of 77801901 in words is "seventy-seven million, eight hundred one thousand, nine hundred one".