1942739431 has 4 divisors (see below), whose sum is σ = 1943177272. Its totient is φ = 1942301592.

The previous prime is 1942739429. The next prime is 1942739467. The reversal of 1942739431 is 1349372491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1349372491 = 47 ⋅28710053.

It is a cyclic number.

It is not a de Polignac number, because 1942739431 - 2¹ = 1942739429 is a prime.

It is a super-2 number, since 2×1942739431² = 7548472993524407522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942739231) 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, 212196 + ... + 221161.

It is an arithmetic number, because the mean of its divisors is an integer number (485794318).

Almost surely, 2^1942739431 is an apocalyptic number.

1942739431 is a deficient number, since it is larger than the sum of its proper divisors (437841).

1942739431 is an equidigital number, since it uses as much as digits as its factorization.

1942739431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437840.

The product of its digits is 163296, while the sum is 43.

The square root of 1942739431 is about 44076.5179091997. The cubic root of 1942739431 is about 1247.7804732400.

The spelling of 1942739431 in words is "one billion, nine hundred forty-two million, seven hundred thirty-nine thousand, four hundred thirty-one".