106400621 has 4 divisors (see below), whose sum is σ = 108664512. Its totient is φ = 104136732.

The previous prime is 106400579. The next prime is 106400629. The reversal of 106400621 is 126004601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 106400621 - 2⁶ = 106400557 is a prime.

It is a super-2 number, since 2×106400621² = 22642184298371282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 106400593 and 106400602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106400629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131875 + ... + 1131968.

It is an arithmetic number, because the mean of its divisors is an integer number (27166128).

Almost surely, 2^106400621 is an apocalyptic number.

It is an amenable number.

106400621 is a deficient number, since it is larger than the sum of its proper divisors (2263891).

106400621 is an equidigital number, since it uses as much as digits as its factorization.

106400621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263890.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 106400621 is about 10315.0676682221. The cubic root of 106400621 is about 473.8578223128.

The spelling of 106400621 in words is "one hundred six million, four hundred thousand, six hundred twenty-one".