120657813 has 4 divisors (see below), whose sum is σ = 160877088. Its totient is φ = 80438540.

The previous prime is 120657811. The next prime is 120657827. The reversal of 120657813 is 318756021.

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 120657813 - 2¹ = 120657811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120657811) 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, 20109633 + ... + 20109638.

It is an arithmetic number, because the mean of its divisors is an integer number (40219272).

Almost surely, 2^120657813 is an apocalyptic number.

It is an amenable number.

120657813 is a deficient number, since it is larger than the sum of its proper divisors (40219275).

120657813 is an equidigital number, since it uses as much as digits as its factorization.

120657813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40219274.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 120657813 is about 10984.4350332641. The cubic root of 120657813 is about 494.1420543024.

The spelling of 120657813 in words is "one hundred twenty million, six hundred fifty-seven thousand, eight hundred thirteen".