207978142 has 8 divisors (see below), whose sum is σ = 328386600. Its totient is φ = 98515944.

The previous prime is 207978109. The next prime is 207978203. The reversal of 207978142 is 241879702.

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

It is a junction number, because it is equal to n+sod(n) for n = 207978095 and 207978104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2736517 + ... + 2736592.

It is an arithmetic number, because the mean of its divisors is an integer number (41048325).

Almost surely, 2^207978142 is an apocalyptic number.

207978142 is a deficient number, since it is larger than the sum of its proper divisors (120408458).

207978142 is a wasteful number, since it uses less digits than its factorization.

207978142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5473130.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 207978142 is about 14421.4472921410. The cubic root of 207978142 is about 592.4784583906.

The spelling of 207978142 in words is "two hundred seven million, nine hundred seventy-eight thousand, one hundred forty-two".