1913430406 has 4 divisors (see below), whose sum is σ = 2870145612. Its totient is φ = 956715202.

The previous prime is 1913430403. The next prime is 1913430503. The reversal of 1913430406 is 6040343191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6040343191 = 23 ⋅262623617.

It is a super-2 number, since 2×1913430406² = 7322431837210649672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913430403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478357600 + ... + 478357603.

It is an arithmetic number, because the mean of its divisors is an integer number (717536403).

Almost surely, 2^1913430406 is an apocalyptic number.

1913430406 is a deficient number, since it is larger than the sum of its proper divisors (956715206).

1913430406 is an equidigital number, since it uses as much as digits as its factorization.

1913430406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956715205.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1913430406 is about 43742.7754720708. The cubic root of 1913430406 is about 1241.4737952414.

Adding to 1913430406 its reverse (6040343191), we get a palindrome (7953773597).

The spelling of 1913430406 in words is "one billion, nine hundred thirteen million, four hundred thirty thousand, four hundred six".