1945377139 has 2 divisors, whose sum is σ = 1945377140. Its totient is φ = 1945377138.

The previous prime is 1945377113. The next prime is 1945377163. The reversal of 1945377139 is 9317735491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1945377139 - 2⁵ = 1945377107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1945377092 and 1945377101.

It is not a weakly prime, because it can be changed into another prime (1945377839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972688569 + 972688570.

It is an arithmetic number, because the mean of its divisors is an integer number (972688570).

Almost surely, 2^1945377139 is an apocalyptic number.

1945377139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945377139 is an equidigital number, since it uses as much as digits as its factorization.

1945377139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 49.

The square root of 1945377139 is about 44106.4296786761. The cubic root of 1945377139 is about 1248.3449325552.

The spelling of 1945377139 in words is "one billion, nine hundred forty-five million, three hundred seventy-seven thousand, one hundred thirty-nine".