1955357139 has 4 divisors (see below), whose sum is σ = 2607142856. Its totient is φ = 1303571424.

The previous prime is 1955357113. The next prime is 1955357141. The reversal of 1955357139 is 9317535591.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1955357139 - 2¹³ = 1955348947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955357179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325892854 + ... + 325892859.

It is an arithmetic number, because the mean of its divisors is an integer number (651785714).

Almost surely, 2^1955357139 is an apocalyptic number.

1955357139 is a deficient number, since it is larger than the sum of its proper divisors (651785717).

1955357139 is an equidigital number, since it uses as much as digits as its factorization.

1955357139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651785716.

The product of its digits is 637875, while the sum is 48.

The square root of 1955357139 is about 44219.4203829042. The cubic root of 1955357139 is about 1250.4760083632.

The spelling of 1955357139 in words is "one billion, nine hundred fifty-five million, three hundred fifty-seven thousand, one hundred thirty-nine".