1970357421 has 4 divisors (see below), whose sum is σ = 2627143232. Its totient is φ = 1313571612.

The previous prime is 1970357419. The next prime is 1970357447. The reversal of 1970357421 is 1247530791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1970357421 - 2¹ = 1970357419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1970357421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970358421) 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, 328392901 + ... + 328392906.

It is an arithmetic number, because the mean of its divisors is an integer number (656785808).

Almost surely, 2^1970357421 is an apocalyptic number.

It is an amenable number.

1970357421 is a deficient number, since it is larger than the sum of its proper divisors (656785811).

1970357421 is an equidigital number, since it uses as much as digits as its factorization.

1970357421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656785810.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 1970357421 is about 44388.7082600970. The cubic root of 1970357421 is about 1253.6654906495.

The spelling of 1970357421 in words is "one billion, nine hundred seventy million, three hundred fifty-seven thousand, four hundred twenty-one".