783145947 has 18 divisors (see below), whose sum is σ = 1061071284. Its totient is φ = 513792600.

The previous prime is 783145939. The next prime is 783145969. The reversal of 783145947 is 749541387.

It is a happy number.

It is not a de Polignac number, because 783145947 - 2³ = 783145939 is a prime.

It is a super-2 number, since 2×783145947² = 1226635148605053618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 783145896 and 783145905.

It is not an unprimeable number, because it can be changed into a prime (783145907) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5186322 + ... + 5186472.

Almost surely, 2^783145947 is an apocalyptic number.

783145947 is a deficient number, since it is larger than the sum of its proper divisors (277925337).

783145947 is an equidigital number, since it uses as much as digits as its factorization.

783145947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 261 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The square root of 783145947 is about 27984.7448978904. The cubic root of 783145947 is about 921.7523104857.

Multiplying 783145947 by its sum of digits (48), we get a square (37591005456 = 193884²).

The spelling of 783145947 in words is "seven hundred eighty-three million, one hundred forty-five thousand, nine hundred forty-seven".