783475921 has 2 divisors, whose sum is σ = 783475922. Its totient is φ = 783475920.

The previous prime is 783475897. The next prime is 783475937. The reversal of 783475921 is 129574387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 780364225 + 3111696 = 27935^2 + 1764^2 .

It is a cyclic number.

It is not a de Polignac number, because 783475921 - 2¹⁹ = 782951633 is a prime.

It is a super-2 number, since 2×783475921² = 1227669037573596482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (783475981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391737960 + 391737961.

It is an arithmetic number, because the mean of its divisors is an integer number (391737961).

Almost surely, 2^783475921 is an apocalyptic number.

It is an amenable number.

783475921 is a deficient number, since it is larger than the sum of its proper divisors (1).

783475921 is an equidigital number, since it uses as much as digits as its factorization.

783475921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 783475921 is about 27990.6398819320. The cubic root of 783475921 is about 921.8817506368.

The spelling of 783475921 in words is "seven hundred eighty-three million, four hundred seventy-five thousand, nine hundred twenty-one".