142977313 has 4 divisors (see below), whose sum is σ = 143030448. Its totient is φ = 142924180.

The previous prime is 142977311. The next prime is 142977319. The reversal of 142977313 is 313779241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313779241 = 31 ⋅10121911.

It is a cyclic number.

It is not a de Polignac number, because 142977313 - 2¹ = 142977311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142977311) 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, 22303 + ... + 27988.

It is an arithmetic number, because the mean of its divisors is an integer number (35757612).

Almost surely, 2^142977313 is an apocalyptic number.

It is an amenable number.

142977313 is a deficient number, since it is larger than the sum of its proper divisors (53135).

142977313 is an equidigital number, since it uses as much as digits as its factorization.

142977313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53134.

The product of its digits is 31752, while the sum is 37.

The square root of 142977313 is about 11957.3121143508. The cubic root of 142977313 is about 522.9044972567.

The spelling of 142977313 in words is "one hundred forty-two million, nine hundred seventy-seven thousand, three hundred thirteen".