1949729687 has 2 divisors, whose sum is σ = 1949729688. Its totient is φ = 1949729686.

The previous prime is 1949729671. The next prime is 1949729713. The reversal of 1949729687 is 7869279491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1949729687 - 2⁴ = 1949729671 is a prime.

It is a super-3 number, since 3×1949729687³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1949729657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974864843 + 974864844.

It is an arithmetic number, because the mean of its divisors is an integer number (974864844).

Almost surely, 2^1949729687 is an apocalyptic number.

1949729687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949729687 is an equidigital number, since it uses as much as digits as its factorization.

1949729687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 62.

The square root of 1949729687 is about 44155.7435335427. The cubic root of 1949729687 is about 1249.2752464270.

The spelling of 1949729687 in words is "one billion, nine hundred forty-nine million, seven hundred twenty-nine thousand, six hundred eighty-seven".