142909923 has 16 divisors (see below), whose sum is σ = 206589600. Its totient is φ = 87350784.

The previous prime is 142909919. The next prime is 142909927. The reversal of 142909923 is 329909241.

It is an interprime number because it is at equal distance from previous prime (142909919) and next prime (142909927).

It is not a de Polignac number, because 142909923 - 2² = 142909919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (142909927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6486 + ... + 18107.

It is an arithmetic number, because the mean of its divisors is an integer number (12911850).

Almost surely, 2^142909923 is an apocalyptic number.

142909923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

142909923 is a deficient number, since it is larger than the sum of its proper divisors (63679677).

142909923 is a wasteful number, since it uses less digits than its factorization.

142909923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24758.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 142909923 is about 11954.4938412297. The cubic root of 142909923 is about 522.8223302071.

The spelling of 142909923 in words is "one hundred forty-two million, nine hundred nine thousand, nine hundred twenty-three".