73777401 has 6 divisors (see below), whose sum is σ = 106567370. Its totient is φ = 49184928.

The previous prime is 73777397. The next prime is 73777411. The reversal of 73777401 is 10477737.

It can be written as a sum of positive squares in only one way, i.e., 65221776 + 8555625 = 8076^2 + 2925^2 .

It is not a de Polignac number, because 73777401 - 2² = 73777397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73777411) 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 5 ways as a sum of consecutive naturals, for example, 4098736 + ... + 4098753.

Almost surely, 2^73777401 is an apocalyptic number.

It is an amenable number.

73777401 is a deficient number, since it is larger than the sum of its proper divisors (32789969).

73777401 is a wasteful number, since it uses less digits than its factorization.

73777401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8197495 (or 8197492 counting only the distinct ones).

The product of its (nonzero) digits is 28812, while the sum is 36.

The square root of 73777401 is about 8589.3772184018. The cubic root of 73777401 is about 419.4122561320.

The spelling of 73777401 in words is "seventy-three million, seven hundred seventy-seven thousand, four hundred one".