142402993 has 2 divisors, whose sum is σ = 142402994. Its totient is φ = 142402992.

The previous prime is 142402991. The next prime is 142403003. The reversal of 142402993 is 399204241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136609344 + 5793649 = 11688^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 142402993 - 2¹ = 142402991 is a prime.

It is a super-2 number, since 2×142402993² = 40557224830716098, which contains 22 as substring.

Together with 142402991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142402991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71201496 + 71201497.

It is an arithmetic number, because the mean of its divisors is an integer number (71201497).

Almost surely, 2^142402993 is an apocalyptic number.

It is an amenable number.

142402993 is a deficient number, since it is larger than the sum of its proper divisors (1).

142402993 is an equidigital number, since it uses as much as digits as its factorization.

142402993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 142402993 is about 11933.2725184670. The cubic root of 142402993 is about 522.2034127944.

The spelling of 142402993 in words is "one hundred forty-two million, four hundred two thousand, nine hundred ninety-three".