921408154 has 16 divisors (see below), whose sum is σ = 1455518880. Its totient is φ = 436257360.

The previous prime is 921408119. The next prime is 921408161. The reversal of 921408154 is 451804129.

It is a happy number.

It is an unprimeable number.

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, 110392 + ... + 118444.

It is an arithmetic number, because the mean of its divisors is an integer number (90969930).

Almost surely, 2^921408154 is an apocalyptic number.

921408154 is a deficient number, since it is larger than the sum of its proper divisors (534110726).

921408154 is a wasteful number, since it uses less digits than its factorization.

921408154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11085.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 921408154 is about 30354.7056319115. The cubic root of 921408154 is about 973.0847887883.

The spelling of 921408154 in words is "nine hundred twenty-one million, four hundred eight thousand, one hundred fifty-four".