1970243906 has 8 divisors (see below), whose sum is σ = 2956394700. Its totient is φ = 984779008.

The previous prime is 1970243903. The next prime is 1970243909. The reversal of 1970243906 is 6093420791.

It is an interprime number because it is at equal distance from previous prime (1970243903) and next prime (1970243909).

It can be written as a sum of positive squares in 2 ways, for example, as 1861145881 + 109098025 = 43141^2 + 10445^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1970243906² = 7763722098260273672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1970243903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164231 + ... + 175818.

Almost surely, 2^1970243906 is an apocalyptic number.

1970243906 is a deficient number, since it is larger than the sum of its proper divisors (986150794).

1970243906 is a wasteful number, since it uses less digits than its factorization.

1970243906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342948.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1970243906 is about 44387.4295944246. The cubic root of 1970243906 is about 1253.6414150563.

The spelling of 1970243906 in words is "one billion, nine hundred seventy million, two hundred forty-three thousand, nine hundred six".