1913856197 has 8 divisors (see below), whose sum is σ = 2178619200. Its totient is φ = 1664222560.

The previous prime is 1913856193. The next prime is 1913856199. The reversal of 1913856197 is 7916583191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1913856197 - 2² = 1913856193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913856193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3782072 + ... + 3782577.

It is an arithmetic number, because the mean of its divisors is an integer number (272327400).

Almost surely, 2^1913856197 is an apocalyptic number.

It is an amenable number.

1913856197 is a deficient number, since it is larger than the sum of its proper divisors (264763003).

1913856197 is a wasteful number, since it uses less digits than its factorization.

1913856197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7564683.

The product of its digits is 408240, while the sum is 50.

The square root of 1913856197 is about 43747.6421878940. The cubic root of 1913856197 is about 1241.5658757898.

The spelling of 1913856197 in words is "one billion, nine hundred thirteen million, eight hundred fifty-six thousand, one hundred ninety-seven".