1929992249 has 2 divisors, whose sum is σ = 1929992250. Its totient is φ = 1929992248.

The previous prime is 1929992227. The next prime is 1929992329. The reversal of 1929992249 is 9422999291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1801578025 + 128414224 = 42445^2 + 11332^2 .

It is a cyclic number.

It is not a de Polignac number, because 1929992249 - 2²⁴ = 1913215033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1929992194 and 1929992203.

It is not a weakly prime, because it can be changed into another prime (1929997249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964996124 + 964996125.

It is an arithmetic number, because the mean of its divisors is an integer number (964996125).

Almost surely, 2^1929992249 is an apocalyptic number.

It is an amenable number.

1929992249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1929992249 is an equidigital number, since it uses as much as digits as its factorization.

1929992249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 56.

The square root of 1929992249 is about 43931.6770565386. The cubic root of 1929992249 is about 1245.0454006228.

The spelling of 1929992249 in words is "one billion, nine hundred twenty-nine million, nine hundred ninety-two thousand, two hundred forty-nine".