2399542137 has 28 divisors (see below), whose sum is σ = 3754113984. Its totient is φ = 1530132120.

The previous prime is 2399542133. The next prime is 2399542141. The reversal of 2399542137 is 7312459932.

2399542137 is a `hidden beast` number, since 2 + 3 + 99 + 542 + 13 + 7 = 666.

2399542137 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2399542133) and next prime (2399542141).

It is not a de Polignac number, because 2399542137 - 2² = 2399542133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2399542092 and 2399542101.

It is not an unprimeable number, because it can be changed into a prime (2399542133) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 54789 + ... + 88322.

Almost surely, 2^2399542137 is an apocalyptic number.

2399542137 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2399542137 is a deficient number, since it is larger than the sum of its proper divisors (1354571847).

2399542137 is an equidigital number, since it uses as much as digits as its factorization.

2399542137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143152 (or 143137 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 2399542137 is about 48985.1215880904. The cubic root of 2399542137 is about 1338.7807534776.

The spelling of 2399542137 in words is "two billion, three hundred ninety-nine million, five hundred forty-two thousand, one hundred thirty-seven".