2145393937 has 2 divisors, whose sum is σ = 2145393938. Its totient is φ = 2145393936.

The previous prime is 2145393923. The next prime is 2145393941. The reversal of 2145393937 is 7393935412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1967011201 + 178382736 = 44351^2 + 13356^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145393937 - 2¹¹ = 2145391889 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145393637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072696968 + 1072696969.

It is an arithmetic number, because the mean of its divisors is an integer number (1072696969).

Almost surely, 2^2145393937 is an apocalyptic number.

It is an amenable number.

2145393937 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145393937 is an equidigital number, since it uses as much as digits as its factorization.

2145393937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 46.

The square root of 2145393937 is about 46318.3973923969. The cubic root of 2145393937 is about 1289.7405357215.

The spelling of 2145393937 in words is "two billion, one hundred forty-five million, three hundred ninety-three thousand, nine hundred thirty-seven".