431954986 has 4 divisors (see below), whose sum is σ = 647932482. Its totient is φ = 215977492.

The previous prime is 431954981. The next prime is 431954993. The reversal of 431954986 is 689459134.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 321305625 + 110649361 = 17925^2 + 10519^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (431954981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107988745 + ... + 107988748.

Almost surely, 2^431954986 is an apocalyptic number.

431954986 is a deficient number, since it is larger than the sum of its proper divisors (215977496).

431954986 is a wasteful number, since it uses less digits than its factorization.

431954986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215977495.

The product of its digits is 933120, while the sum is 49.

The square root of 431954986 is about 20783.5267940742. The cubic root of 431954986 is about 755.9263725035.

The spelling of 431954986 in words is "four hundred thirty-one million, nine hundred fifty-four thousand, nine hundred eighty-six".