145904137 has 2 divisors, whose sum is σ = 145904138. Its totient is φ = 145904136.

The previous prime is 145904119. The next prime is 145904141. The reversal of 145904137 is 731409541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98624761 + 47279376 = 9931^2 + 6876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145904137 is a prime.

It is not a weakly prime, because it can be changed into another prime (145904147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72952068 + 72952069.

It is an arithmetic number, because the mean of its divisors is an integer number (72952069).

Almost surely, 2^145904137 is an apocalyptic number.

It is an amenable number.

145904137 is a deficient number, since it is larger than the sum of its proper divisors (1).

145904137 is an equidigital number, since it uses as much as digits as its factorization.

145904137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 145904137 is about 12079.0784830632. The cubic root of 145904137 is about 526.4484710546.

The spelling of 145904137 in words is "one hundred forty-five million, nine hundred four thousand, one hundred thirty-seven".