623472771349 has 4 divisors (see below), whose sum is σ = 644971832460. Its totient is φ = 601973710240.

The previous prime is 623472771347. The next prime is 623472771359. The reversal of 623472771349 is 943177274326.

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

It can be written as a sum of positive squares in 2 ways, for example, as 373015562500 + 250457208849 = 610750^2 + 500457^2 .

It is a cyclic number.

It is not a de Polignac number, because 623472771349 - 2¹ = 623472771347 is a prime.

It is a super-2 number, since 2×623472771349² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623472771349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623472771347) 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, 10749530512 + ... + 10749530569.

It is an arithmetic number, because the mean of its divisors is an integer number (161242958115).

Almost surely, 2^623472771349 is an apocalyptic number.

It is an amenable number.

623472771349 is a deficient number, since it is larger than the sum of its proper divisors (21499061111).

623472771349 is a wasteful number, since it uses less digits than its factorization.

623472771349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21499061110.

The product of its digits is 10668672, while the sum is 55.

The spelling of 623472771349 in words is "six hundred twenty-three billion, four hundred seventy-two million, seven hundred seventy-one thousand, three hundred forty-nine".