126998739 has 48 divisors (see below), whose sum is σ = 222710400. Its totient is φ = 71296848.

The previous prime is 126998699. The next prime is 126998777. The reversal of 126998739 is 937899621.

It is not a de Polignac number, because 126998739 - 2¹² = 126994643 is a prime.

It is a super-2 number, since 2×126998739² = 32257359415180242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126998239) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77244 + ... + 78870.

It is an arithmetic number, because the mean of its divisors is an integer number (4639800).

Almost surely, 2^126998739 is an apocalyptic number.

126998739 is a deficient number, since it is larger than the sum of its proper divisors (95711661).

126998739 is a wasteful number, since it uses less digits than its factorization.

126998739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709 (or 1696 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 126998739 is about 11269.3717216178. The cubic root of 126998739 is about 502.6509058910.

The spelling of 126998739 in words is "one hundred twenty-six million, nine hundred ninety-eight thousand, seven hundred thirty-nine".