623121545 has 8 divisors (see below), whose sum is σ = 771866880. Its totient is φ = 482416560.

The previous prime is 623121533. The next prime is 623121547. The reversal of 623121545 is 545121326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623121545 - 2⁶ = 623121481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623121547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009915 + ... + 2010224.

It is an arithmetic number, because the mean of its divisors is an integer number (96483360).

Almost surely, 2^623121545 is an apocalyptic number.

It is an amenable number.

623121545 is a deficient number, since it is larger than the sum of its proper divisors (148745335).

623121545 is a wasteful number, since it uses less digits than its factorization.

623121545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020175.

The product of its digits is 7200, while the sum is 29.

The square root of 623121545 is about 24962.4026287535. The cubic root of 623121545 is about 854.1305503296.

The spelling of 623121545 in words is "six hundred twenty-three million, one hundred twenty-one thousand, five hundred forty-five".