142649723 has 4 divisors (see below), whose sum is σ = 143676120. Its totient is φ = 141623328.

The previous prime is 142649719. The next prime is 142649789. The reversal of 142649723 is 327946241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142649723 - 2² = 142649719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142649713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512990 + ... + 513267.

It is an arithmetic number, because the mean of its divisors is an integer number (35919030).

Almost surely, 2^142649723 is an apocalyptic number.

142649723 is a deficient number, since it is larger than the sum of its proper divisors (1026397).

142649723 is a wasteful number, since it uses less digits than its factorization.

142649723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026396.

The product of its digits is 72576, while the sum is 38.

The square root of 142649723 is about 11943.6059462794. The cubic root of 142649723 is about 522.5048318044.

The spelling of 142649723 in words is "one hundred forty-two million, six hundred forty-nine thousand, seven hundred twenty-three".