1913725153 has 4 divisors (see below), whose sum is σ = 1921349808. Its totient is φ = 1906100500.

The previous prime is 1913725147. The next prime is 1913725169. The reversal of 1913725153 is 3515273191.

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: 3515273191 = 79 ⋅44497129.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1913725153 is a prime.

It is a super-2 number, since 2×1913725153² = 7324687922449746818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1913725103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3811951 + ... + 3812452.

It is an arithmetic number, because the mean of its divisors is an integer number (480337452).

Almost surely, 2^1913725153 is an apocalyptic number.

It is an amenable number.

1913725153 is a deficient number, since it is larger than the sum of its proper divisors (7624655).

1913725153 is an equidigital number, since it uses as much as digits as its factorization.

1913725153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624654.

The product of its digits is 28350, while the sum is 37.

The square root of 1913725153 is about 43746.1444358243. The cubic root of 1913725153 is about 1241.5375379812.

The spelling of 1913725153 in words is "one billion, nine hundred thirteen million, seven hundred twenty-five thousand, one hundred fifty-three".