1429937981 has 2 divisors, whose sum is σ = 1429937982. Its totient is φ = 1429937980.

The previous prime is 1429937969. The next prime is 1429937989. The reversal of 1429937981 is 1897399241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1426270756 + 3667225 = 37766^2 + 1915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1429937981 is a prime.

It is a super-2 number, since 2×1429937981² = 4089445259012712722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1429937989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714968990 + 714968991.

It is an arithmetic number, because the mean of its divisors is an integer number (714968991).

Almost surely, 2^1429937981 is an apocalyptic number.

It is an amenable number.

1429937981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1429937981 is an equidigital number, since it uses as much as digits as its factorization.

1429937981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 1429937981 is about 37814.5207691437. The cubic root of 1429937981 is about 1126.6068839097.

The spelling of 1429937981 in words is "one billion, four hundred twenty-nine million, nine hundred thirty-seven thousand, nine hundred eighty-one".