120724399 has 2 divisors, whose sum is σ = 120724400. Its totient is φ = 120724398.

The previous prime is 120724381. The next prime is 120724411. The reversal of 120724399 is 993427021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120724399 - 2⁹ = 120723887 is a prime.

It is a super-2 number, since 2×120724399² = 29148761027822402, which contains 22 as substring.

It is equal to p_6880519 and since 120724399 and 6880519 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120724369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60362199 + 60362200.

It is an arithmetic number, because the mean of its divisors is an integer number (60362200).

Almost surely, 2^120724399 is an apocalyptic number.

120724399 is a deficient number, since it is larger than the sum of its proper divisors (1).

120724399 is an equidigital number, since it uses as much as digits as its factorization.

120724399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 120724399 is about 10987.4655403328. The cubic root of 120724399 is about 494.2329363632.

It can be divided in two parts, 12072 and 4399, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 120724399 in words is "one hundred twenty million, seven hundred twenty-four thousand, three hundred ninety-nine".