1954669243 has 4 divisors (see below), whose sum is σ = 1981445608. Its totient is φ = 1927892880.

The previous prime is 1954669217. The next prime is 1954669253. The reversal of 1954669243 is 3429664591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3429664591 = 127 ⋅27005233.

It is a cyclic number.

It is not a de Polignac number, because 1954669243 - 2¹⁷ = 1954538171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1954669253) 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, 13388073 + ... + 13388218.

It is an arithmetic number, because the mean of its divisors is an integer number (495361402).

Almost surely, 2^1954669243 is an apocalyptic number.

1954669243 is a deficient number, since it is larger than the sum of its proper divisors (26776365).

1954669243 is an equidigital number, since it uses as much as digits as its factorization.

1954669243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26776364.

The product of its digits is 1399680, while the sum is 49.

The square root of 1954669243 is about 44211.6414872825. The cubic root of 1954669243 is about 1250.3293517210.

The spelling of 1954669243 in words is "one billion, nine hundred fifty-four million, six hundred sixty-nine thousand, two hundred forty-three".