1246807989 has 72 divisors (see below), whose sum is σ = 2213894592. Its totient is φ = 672819840.

The previous prime is 1246807967. The next prime is 1246808021. The reversal of 1246807989 is 9897086421.

It is not a de Polignac number, because 1246807989 - 2⁸ = 1246807733 is a prime.

It is a super-2 number, since 2×1246807989² = 3109060322868448242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246807589) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 841129 + ... + 842609.

It is an arithmetic number, because the mean of its divisors is an integer number (30748536).

Almost surely, 2^1246807989 is an apocalyptic number.

It is an amenable number.

1246807989 is a deficient number, since it is larger than the sum of its proper divisors (967086603).

1246807989 is a wasteful number, since it uses less digits than its factorization.

1246807989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 1246807989 is about 35310.1683513404. The cubic root of 1246807989 is about 1076.2996328489.

The spelling of 1246807989 in words is "one billion, two hundred forty-six million, eight hundred seven thousand, nine hundred eighty-nine".