731004977 has 4 divisors (see below), whose sum is σ = 731088996. Its totient is φ = 730920960.

The previous prime is 731004899. The next prime is 731004979. The reversal of 731004977 is 779400137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779400137 = 25247 ⋅30871.

It can be written as a sum of positive squares in 2 ways, for example, as 383219776 + 347785201 = 19576^2 + 18649^2 .

It is a cyclic number.

It is not a de Polignac number, because 731004977 - 2¹⁸ = 730742833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 731004977.

It is not an unprimeable number, because it can be changed into a prime (731004979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27224 + ... + 46937.

It is an arithmetic number, because the mean of its divisors is an integer number (182772249).

Almost surely, 2^731004977 is an apocalyptic number.

It is an amenable number.

731004977 is a deficient number, since it is larger than the sum of its proper divisors (84019).

731004977 is an equidigital number, since it uses as much as digits as its factorization.

731004977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84018.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 731004977 is about 27037.1037095322. The cubic root of 731004977 is about 900.8243381480.

The spelling of 731004977 in words is "seven hundred thirty-one million, four thousand, nine hundred seventy-seven".