105620491 has 2 divisors, whose sum is σ = 105620492. Its totient is φ = 105620490.

The previous prime is 105620461. The next prime is 105620509. The reversal of 105620491 is 194026501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105620491 is a prime.

It is a super-2 number, since 2×105620491² = 22311376238162162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105620461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52810245 + 52810246.

It is an arithmetic number, because the mean of its divisors is an integer number (52810246).

Almost surely, 2^105620491 is an apocalyptic number.

105620491 is a deficient number, since it is larger than the sum of its proper divisors (1).

105620491 is an equidigital number, since it uses as much as digits as its factorization.

105620491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 105620491 is about 10277.1830284373. The cubic root of 105620491 is about 472.6968708270.

Adding to 105620491 its reverse (194026501), we get a palindrome (299646992).

The spelling of 105620491 in words is "one hundred five million, six hundred twenty thousand, four hundred ninety-one".