921416086 has 4 divisors (see below), whose sum is σ = 1382124132. Its totient is φ = 460708042.

The previous prime is 921416081. The next prime is 921416123. The reversal of 921416086 is 680614129.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 680614129 = 13 ⋅52354933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921416081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230354020 + ... + 230354023.

It is an arithmetic number, because the mean of its divisors is an integer number (345531033).

Almost surely, 2^921416086 is an apocalyptic number.

921416086 is a deficient number, since it is larger than the sum of its proper divisors (460708046).

921416086 is a wasteful number, since it uses less digits than its factorization.

921416086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460708045.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 921416086 is about 30354.8362868259. The cubic root of 921416086 is about 973.0875810675.

The spelling of 921416086 in words is "nine hundred twenty-one million, four hundred sixteen thousand, eighty-six".