921214761 has 4 divisors (see below), whose sum is σ = 1228286352. Its totient is φ = 614143172.

The previous prime is 921214747. The next prime is 921214769. The reversal of 921214761 is 167412129.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 167412129 = 3 ⋅55804043.

It is a cyclic number.

It is not a de Polignac number, because 921214761 - 2⁷ = 921214633 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (921214769) 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 3 ways as a sum of consecutive naturals, for example, 153535791 + ... + 153535796.

It is an arithmetic number, because the mean of its divisors is an integer number (307071588).

Almost surely, 2^921214761 is an apocalyptic number.

It is an amenable number.

921214761 is a deficient number, since it is larger than the sum of its proper divisors (307071591).

921214761 is a wasteful number, since it uses less digits than its factorization.

921214761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307071590.

The product of its digits is 6048, while the sum is 33.

The square root of 921214761 is about 30351.5199125184. The cubic root of 921214761 is about 973.0167042471.

The spelling of 921214761 in words is "nine hundred twenty-one million, two hundred fourteen thousand, seven hundred sixty-one".