73972477 has 2 divisors, whose sum is σ = 73972478. Its totient is φ = 73972476.

The previous prime is 73972469. The next prime is 73972517. The reversal of 73972477 is 77427937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 7043716 = 8181^2 + 2654^2 .

It is a cyclic number.

It is not a de Polignac number, because 73972477 - 2³ = 73972469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73972447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36986238 + 36986239.

It is an arithmetic number, because the mean of its divisors is an integer number (36986239).

Almost surely, 2^73972477 is an apocalyptic number.

It is an amenable number.

73972477 is a deficient number, since it is larger than the sum of its proper divisors (1).

73972477 is an equidigital number, since it uses as much as digits as its factorization.

73972477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518616, while the sum is 46.

The square root of 73972477 is about 8600.7253763854. The cubic root of 73972477 is about 419.7815890102.

The spelling of 73972477 in words is "seventy-three million, nine hundred seventy-two thousand, four hundred seventy-seven".