1913976242 has 4 divisors (see below), whose sum is σ = 2870964366. Its totient is φ = 956988120.

The previous prime is 1913976223. The next prime is 1913976247. The reversal of 1913976242 is 2426793191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2426793191 = 919 ⋅2640689.

It can be written as a sum of positive squares in only one way, i.e., 1793437801 + 120538441 = 42349^2 + 10979^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1913976193 and 1913976202.

It is not an unprimeable number, because it can be changed into a prime (1913976247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478494059 + ... + 478494062.

Almost surely, 2^1913976242 is an apocalyptic number.

1913976242 is a deficient number, since it is larger than the sum of its proper divisors (956988124).

1913976242 is an equidigital number, since it uses as much as digits as its factorization.

1913976242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956988123.

The product of its digits is 163296, while the sum is 44.

The square root of 1913976242 is about 43749.0141831790. The cubic root of 1913976242 is about 1241.5918339678.

The spelling of 1913976242 in words is "one billion, nine hundred thirteen million, nine hundred seventy-six thousand, two hundred forty-two".