763921 has 2 divisors, whose sum is σ = 763922. Its totient is φ = 763920.

The previous prime is 763913. The next prime is 763927. The reversal of 763921 is 129367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 698896 + 65025 = 836^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 763921 - 2³ = 763913 is a prime.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 763921.

It is not a weakly prime, because it can be changed into another prime (763927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381960 + 381961.

It is an arithmetic number, because the mean of its divisors is an integer number (381961).

2⁷⁶³⁹²¹ is an apocalyptic number.

It is an amenable number.

763921 is a deficient number, since it is larger than the sum of its proper divisors (1).

763921 is an equidigital number, since it uses as much as digits as its factorization.

763921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 763921 is about 874.0257433280. The cubic root of 763921 is about 91.4147234188.

The spelling of 763921 in words is "seven hundred sixty-three thousand, nine hundred twenty-one".