1970351257 has 8 divisors (see below), whose sum is σ = 2252479232. Its totient is φ = 1688385600.

The previous prime is 1970351233. The next prime is 1970351261. The reversal of 1970351257 is 7521530791.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1970351257 is a prime.

It is a super-2 number, since 2×1970351257² = 7764568151922960098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1970351287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13344 + ... + 64177.

It is an arithmetic number, because the mean of its divisors is an integer number (281559904).

Almost surely, 2^1970351257 is an apocalyptic number.

It is an amenable number.

1970351257 is a deficient number, since it is larger than the sum of its proper divisors (282127975).

1970351257 is an equidigital number, since it uses as much as digits as its factorization.

1970351257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81159.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 1970351257 is about 44388.6388279704. The cubic root of 1970351257 is about 1253.6641833398.

The spelling of 1970351257 in words is "one billion, nine hundred seventy million, three hundred fifty-one thousand, two hundred fifty-seven".