916148993 has 4 divisors (see below), whose sum is σ = 916340160. Its totient is φ = 915957828.

The previous prime is 916148953. The next prime is 916149137. The reversal of 916148993 is 399841619.

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: 399841619 = 1667 ⋅239857.

It is a cyclic number.

It is not a de Polignac number, because 916148993 - 2⁶ = 916148929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (916148923) 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, 88205 + ... + 98042.

It is an arithmetic number, because the mean of its divisors is an integer number (229085040).

Almost surely, 2^916148993 is an apocalyptic number.

It is an amenable number.

916148993 is a deficient number, since it is larger than the sum of its proper divisors (191167).

916148993 is a wasteful number, since it uses less digits than its factorization.

916148993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191166.

The product of its digits is 419904, while the sum is 50.

The square root of 916148993 is about 30267.9532344029. The cubic root of 916148993 is about 971.2298825385.

The spelling of 916148993 in words is "nine hundred sixteen million, one hundred forty-eight thousand, nine hundred ninety-three".