783491057 has 4 divisors (see below), whose sum is σ = 810508020. Its totient is φ = 756474096.

The previous prime is 783491047. The next prime is 783491063. The reversal of 783491057 is 750194387.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 514563856 + 268927201 = 22684^2 + 16399^2 .

It is a cyclic number.

It is not a de Polignac number, because 783491057 - 2²² = 779296753 is a prime.

It is a super-2 number, since 2×783491057² = 1227716472797954498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 783490999 and 783491017.

It is not an unprimeable number, because it can be changed into a prime (783491047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13508438 + ... + 13508495.

It is an arithmetic number, because the mean of its divisors is an integer number (202627005).

Almost surely, 2^783491057 is an apocalyptic number.

It is an amenable number.

783491057 is a deficient number, since it is larger than the sum of its proper divisors (27016963).

783491057 is a wasteful number, since it uses less digits than its factorization.

783491057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27016962.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 783491057 is about 27990.9102567244. The cubic root of 783491057 is about 921.8876872210.

The spelling of 783491057 in words is "seven hundred eighty-three million, four hundred ninety-one thousand, fifty-seven".