916229381 has 4 divisors (see below), whose sum is σ = 964452000. Its totient is φ = 868006764.

The previous prime is 916229359. The next prime is 916229383. The reversal of 916229381 is 183922619.

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 916229381 - 2⁶ = 916229317 is a prime.

It is a super-3 number, since 3×916229381³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916229383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24111281 + ... + 24111318.

It is an arithmetic number, because the mean of its divisors is an integer number (241113000).

Almost surely, 2^916229381 is an apocalyptic number.

It is an amenable number.

916229381 is a deficient number, since it is larger than the sum of its proper divisors (48222619).

916229381 is a wasteful number, since it uses less digits than its factorization.

916229381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48222618.

The product of its digits is 46656, while the sum is 41.

The square root of 916229381 is about 30269.2811444210. The cubic root of 916229381 is about 971.2582887421.

The spelling of 916229381 in words is "nine hundred sixteen million, two hundred twenty-nine thousand, three hundred eighty-one".