145631737 has 2 divisors, whose sum is σ = 145631738. Its totient is φ = 145631736.

The previous prime is 145631723. The next prime is 145631743. The reversal of 145631737 is 737136541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140564736 + 5067001 = 11856^2 + 2251^2 .

It is a cyclic number.

It is not a de Polignac number, because 145631737 - 2¹⁵ = 145598969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145631696 and 145631705.

It is not a weakly prime, because it can be changed into another prime (145631777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72815868 + 72815869.

It is an arithmetic number, because the mean of its divisors is an integer number (72815869).

Almost surely, 2^145631737 is an apocalyptic number.

It is an amenable number.

145631737 is a deficient number, since it is larger than the sum of its proper divisors (1).

145631737 is an equidigital number, since it uses as much as digits as its factorization.

145631737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 37.

The square root of 145631737 is about 12067.7975206746. The cubic root of 145631737 is about 526.1206441595.

The spelling of 145631737 in words is "one hundred forty-five million, six hundred thirty-one thousand, seven hundred thirty-seven".