191940970 has 16 divisors (see below), whose sum is σ = 372070440. Its totient is φ = 70870464.

The previous prime is 191940943. The next prime is 191940979. The reversal of 191940970 is 79049191.

It is a happy number.

191940970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 107723641 + 84217329 = 10379^2 + 9177^2 .

It is not an unprimeable number, because it can be changed into a prime (191940979) 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, 738105 + ... + 738364.

Almost surely, 2^191940970 is an apocalyptic number.

191940970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191940970 is a deficient number, since it is larger than the sum of its proper divisors (180129470).

191940970 is a wasteful number, since it uses less digits than its factorization.

191940970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476489.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 191940970 is about 13854.2762351557. The cubic root of 191940970 is about 576.8406998462.

The spelling of 191940970 in words is "one hundred ninety-one million, nine hundred forty thousand, nine hundred seventy".