143377921 has 2 divisors, whose sum is σ = 143377922. Its totient is φ = 143377920.

The previous prime is 143377907. The next prime is 143377981. The reversal of 143377921 is 129773341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117418896 + 25959025 = 10836^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 143377921 - 2¹³ = 143369729 is a prime.

It is not a weakly prime, because it can be changed into another prime (143377901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71688960 + 71688961.

It is an arithmetic number, because the mean of its divisors is an integer number (71688961).

Almost surely, 2^143377921 is an apocalyptic number.

It is an amenable number.

143377921 is a deficient number, since it is larger than the sum of its proper divisors (1).

143377921 is an equidigital number, since it uses as much as digits as its factorization.

143377921 is an evil number, because the sum of its binary digits is even.

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

The square root of 143377921 is about 11974.0519875270. The cubic root of 143377921 is about 523.3924170472.

The spelling of 143377921 in words is "one hundred forty-three million, three hundred seventy-seven thousand, nine hundred twenty-one".