1489751971 has 2 divisors, whose sum is σ = 1489751972. Its totient is φ = 1489751970.

The previous prime is 1489751951. The next prime is 1489751999. The reversal of 1489751971 is 1791579841.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1489751971 - 2⁷ = 1489751843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1489751951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744875985 + 744875986.

It is an arithmetic number, because the mean of its divisors is an integer number (744875986).

Almost surely, 2^1489751971 is an apocalyptic number.

1489751971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1489751971 is an equidigital number, since it uses as much as digits as its factorization.

1489751971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 52.

The square root of 1489751971 is about 38597.3052297696. The cubic root of 1489751971 is about 1142.1013798334.

The spelling of 1489751971 in words is "one billion, four hundred eighty-nine million, seven hundred fifty-one thousand, nine hundred seventy-one".