105720487 has 2 divisors, whose sum is σ = 105720488. Its totient is φ = 105720486.

The previous prime is 105720479. The next prime is 105720493. The reversal of 105720487 is 784027501.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105720487 - 2³ = 105720479 is a prime.

It is a super-2 number, since 2×105720487² = 22353642743034338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105720287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52860243 + 52860244.

It is an arithmetic number, because the mean of its divisors is an integer number (52860244).

Almost surely, 2^105720487 is an apocalyptic number.

105720487 is a deficient number, since it is larger than the sum of its proper divisors (1).

105720487 is an equidigital number, since it uses as much as digits as its factorization.

105720487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 105720487 is about 10282.0468293040. The cubic root of 105720487 is about 472.8459987307.

Adding to 105720487 its reverse (784027501), we get a palindrome (889747988).

The spelling of 105720487 in words is "one hundred five million, seven hundred twenty thousand, four hundred eighty-seven".