1973849431 has 2 divisors, whose sum is σ = 1973849432. Its totient is φ = 1973849430.

The previous prime is 1973849419. The next prime is 1973849483. The reversal of 1973849431 is 1349483791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1973849431 - 2⁷ = 1973849303 is a prime.

It is a super-2 number, since 2×1973849431² = 7792163152518047522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973849401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986924715 + 986924716.

It is an arithmetic number, because the mean of its divisors is an integer number (986924716).

Almost surely, 2^1973849431 is an apocalyptic number.

1973849431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973849431 is an equidigital number, since it uses as much as digits as its factorization.

1973849431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 1973849431 is about 44428.0252880994. The cubic root of 1973849431 is about 1254.4056657909.

It can be divided in two parts, 19738 and 49431, that added together give a square (69169 = 263²).

The spelling of 1973849431 in words is "one billion, nine hundred seventy-three million, eight hundred forty-nine thousand, four hundred thirty-one".