761685421 has 8 divisors (see below), whose sum is σ = 877352960. Its totient is φ = 647731728.

The previous prime is 761685403. The next prime is 761685443. The reversal of 761685421 is 124586167.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 761685421 - 2¹³ = 761677229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761685401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427506 + ... + 429283.

It is an arithmetic number, because the mean of its divisors is an integer number (109669120).

Almost surely, 2^761685421 is an apocalyptic number.

It is an amenable number.

761685421 is a deficient number, since it is larger than the sum of its proper divisors (115667539).

761685421 is a wasteful number, since it uses less digits than its factorization.

761685421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856923.

The product of its digits is 80640, while the sum is 40.

The square root of 761685421 is about 27598.6488980892. The cubic root of 761685421 is about 913.2546265521.

The spelling of 761685421 in words is "seven hundred sixty-one million, six hundred eighty-five thousand, four hundred twenty-one".