1970243905 has 32 divisors (see below), whose sum is σ = 2885437440. Its totient is φ = 1262338560.

The previous prime is 1970243903. The next prime is 1970243909. The reversal of 1970243905 is 5093420791.

It is not a de Polignac number, because 1970243905 - 2¹ = 1970243903 is a prime.

It is a super-2 number, since 2×1970243905² = 7763722090379298050, 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 31 ways as a sum of consecutive naturals, for example, 157 + ... + 62773.

It is an arithmetic number, because the mean of its divisors is an integer number (90169920).

Almost surely, 2^1970243905 is an apocalyptic number.

It is an amenable number.

1970243905 is a deficient number, since it is larger than the sum of its proper divisors (915193535).

1970243905 is a wasteful number, since it uses less digits than its factorization.

1970243905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62689.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 1970243905 is about 44387.4295831601. The cubic root of 1970243905 is about 1253.6414148443.

The spelling of 1970243905 in words is "one billion, nine hundred seventy million, two hundred forty-three thousand, nine hundred five".