1240697983 has 12 divisors (see below), whose sum is σ = 1444117800. Its totient is φ = 1062824112.

The previous prime is 1240697977. The next prime is 1240697989. The reversal of 1240697983 is 3897960421.

It is an interprime number because it is at equal distance from previous prime (1240697977) and next prime (1240697989).

It is not a de Polignac number, because 1240697983 - 2⁵ = 1240697951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240697989) 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 in 11 ways as a sum of consecutive naturals, for example, 88168 + ... + 101266.

It is an arithmetic number, because the mean of its divisors is an integer number (120343150).

Almost surely, 2^1240697983 is an apocalyptic number.

1240697983 is a deficient number, since it is larger than the sum of its proper divisors (203419817).

1240697983 is a wasteful number, since it uses less digits than its factorization.

1240697983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15046 (or 15039 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 1240697983 is about 35223.5430216780. The cubic root of 1240697983 is about 1074.5386108701.

The spelling of 1240697983 in words is "one billion, two hundred forty million, six hundred ninety-seven thousand, nine hundred eighty-three".