100431493 has 2 divisors, whose sum is σ = 100431494. Its totient is φ = 100431492.

The previous prime is 100431491. The next prime is 100431497. The reversal of 100431493 is 394134001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100340289 + 91204 = 10017^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 100431493 - 2¹ = 100431491 is a prime.

Together with 100431491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100431491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50215746 + 50215747.

It is an arithmetic number, because the mean of its divisors is an integer number (50215747).

Almost surely, 2^100431493 is an apocalyptic number.

It is an amenable number.

100431493 is a deficient number, since it is larger than the sum of its proper divisors (1).

100431493 is an equidigital number, since it uses as much as digits as its factorization.

100431493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 100431493 is about 10021.5514268001. The cubic root of 100431493 is about 464.8255297980.

Adding to 100431493 its reverse (394134001), we get a palindrome (494565494).

The spelling of 100431493 in words is "one hundred million, four hundred thirty-one thousand, four hundred ninety-three".