1970721343 has 4 divisors (see below), whose sum is σ = 2023984120. Its totient is φ = 1917458568.

The previous prime is 1970721329. The next prime is 1970721353. The reversal of 1970721343 is 3431270791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1970721343 is a prime.

It is a super-2 number, since 2×1970721343² = 7767485223511447298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 53262739 = 1970721343 / (1 + 9 + 7 + 0 + 7 + 2 + 1 + 3 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970721353) 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, 26631333 + ... + 26631406.

It is an arithmetic number, because the mean of its divisors is an integer number (505996030).

Almost surely, 2^1970721343 is an apocalyptic number.

1970721343 is a deficient number, since it is larger than the sum of its proper divisors (53262777).

1970721343 is an equidigital number, since it uses as much as digits as its factorization.

1970721343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53262776.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 1970721343 is about 44392.8073340716. The cubic root of 1970721343 is about 1253.7426692639.

The spelling of 1970721343 in words is "one billion, nine hundred seventy million, seven hundred twenty-one thousand, three hundred forty-three".