763561 has 4 divisors (see below), whose sum is σ = 788224.
Its totient is φ = 738900.
The previous prime is 763559. The next prime is 763573. The reversal of 763561 is 165367.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 763561 - 21 = 763559 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (763261) 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, 12285 + ... + 12346.
It is an arithmetic number, because the mean of its divisors is an integer number (197056).
2763561 is an apocalyptic number.
763561 is the 505-th hex number.
It is an amenable number.
763561 is a deficient number, since it is larger than the sum of its proper divisors (24663).
763561 is a wasteful number, since it uses less digits than its factorization.
763561 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 24662.
The product of its digits is 3780, while the sum is 28.
The square root of 763561 is about 873.8197754686.
The cubic root of 763561 is about 91.4003613442.
The spelling of 763561 in words is "seven hundred sixty-three thousand, five hundred sixty-one".