1913021347 has 4 divisors (see below), whose sum is σ = 1915249240. Its totient is φ = 1910793456.

The previous prime is 1913021321. The next prime is 1913021353. The reversal of 1913021347 is 7431203191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1913021347 - 2⁷ = 1913021219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1913021317) 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, 1112658 + ... + 1114375.

It is an arithmetic number, because the mean of its divisors is an integer number (478812310).

Almost surely, 2^1913021347 is an apocalyptic number.

1913021347 is a deficient number, since it is larger than the sum of its proper divisors (2227893).

1913021347 is an equidigital number, since it uses as much as digits as its factorization.

1913021347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227892.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1913021347 is about 43738.0994900327. The cubic root of 1913021347 is about 1241.3853202489.

The spelling of 1913021347 in words is "one billion, nine hundred thirteen million, twenty-one thousand, three hundred forty-seven".