15474997843 has 2 divisors, whose sum is σ = 15474997844. Its totient is φ = 15474997842.

The previous prime is 15474997801. The next prime is 15474997859. The reversal of 15474997843 is 34879947451.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15474997843 is a prime.

It is not a weakly prime, because it can be changed into another prime (15474997873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7737498921 + 7737498922.

It is an arithmetic number, because the mean of its divisors is an integer number (7737498922).

Almost surely, 2^15474997843 is an apocalyptic number.

15474997843 is a deficient number, since it is larger than the sum of its proper divisors (1).

15474997843 is an equidigital number, since it uses as much as digits as its factorization.

15474997843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 61.

The spelling of 15474997843 in words is "fifteen billion, four hundred seventy-four million, nine hundred ninety-seven thousand, eight hundred forty-three".