913391641 has 4 divisors (see below), whose sum is σ = 926256384. Its totient is φ = 900526900.

The previous prime is 913391639. The next prime is 913391651. The reversal of 913391641 is 146193319.

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: 146193319 = 17 ⋅8599607.

It is a cyclic number.

It is not a de Polignac number, because 913391641 - 2¹ = 913391639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 913391641.

It is not an unprimeable number, because it can be changed into a prime (913391651) 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, 6432265 + ... + 6432406.

It is an arithmetic number, because the mean of its divisors is an integer number (231564096).

Almost surely, 2^913391641 is an apocalyptic number.

It is an amenable number.

913391641 is a deficient number, since it is larger than the sum of its proper divisors (12864743).

913391641 is a wasteful number, since it uses less digits than its factorization.

913391641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12864742.

The product of its digits is 17496, while the sum is 37.

The square root of 913391641 is about 30222.3698772945. The cubic root of 913391641 is about 970.2545266810.

The spelling of 913391641 in words is "nine hundred thirteen million, three hundred ninety-one thousand, six hundred forty-one".