623447634217047 has 4 divisors (see below), whose sum is σ = 831263512289400. Its totient is φ = 415631756144696.

The previous prime is 623447634217027. The next prime is 623447634217061. The reversal of 623447634217047 is 740712436744326.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 623447634217047 - 2⁸ = 623447634216791 is a prime.

It is a super-2 number, since 2×623447634217047² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623447634217007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103907939036172 + ... + 103907939036177.

It is an arithmetic number, because the mean of its divisors is an integer number (207815878072350).

Almost surely, 2^{623447634217047} is an apocalyptic number.

623447634217047 is a deficient number, since it is larger than the sum of its proper divisors (207815878072353).

623447634217047 is a wasteful number, since it uses less digits than its factorization.

623447634217047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207815878072352.

The product of its (nonzero) digits is 113799168, while the sum is 60.

The spelling of 623447634217047 in words is "six hundred twenty-three trillion, four hundred forty-seven billion, six hundred thirty-four million, two hundred seventeen thousand, forty-seven".