623402101 has 4 divisors (see below), whose sum is σ = 712459552. Its totient is φ = 534344652.

The previous prime is 623402099. The next prime is 623402107. The reversal of 623402101 is 101204326.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101204326 = 2 ⋅50602163.

It is a cyclic number.

It is not a de Polignac number, because 623402101 - 2¹ = 623402099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623402107) 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, 44528715 + ... + 44528728.

It is an arithmetic number, because the mean of its divisors is an integer number (178114888).

Almost surely, 2^623402101 is an apocalyptic number.

It is an amenable number.

623402101 is a deficient number, since it is larger than the sum of its proper divisors (89057451).

623402101 is an equidigital number, since it uses as much as digits as its factorization.

623402101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89057450.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 623402101 is about 24968.0215675972. The cubic root of 623402101 is about 854.2587198109.

Adding to 623402101 its reverse (101204326), we get a palindrome (724606427).

The spelling of 623402101 in words is "six hundred twenty-three million, four hundred two thousand, one hundred one".