191445461 has 2 divisors, whose sum is σ = 191445462. Its totient is φ = 191445460.

The previous prime is 191445427. The next prime is 191445467. The reversal of 191445461 is 164544191.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187854436 + 3591025 = 13706^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 191445461 - 2²² = 187251157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191445467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95722730 + 95722731.

It is an arithmetic number, because the mean of its divisors is an integer number (95722731).

Almost surely, 2^191445461 is an apocalyptic number.

It is an amenable number.

191445461 is a deficient number, since it is larger than the sum of its proper divisors (1).

191445461 is an equidigital number, since it uses as much as digits as its factorization.

191445461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 191445461 is about 13836.3817886036. The cubic root of 191445461 is about 576.3438872500.

The spelling of 191445461 in words is "one hundred ninety-one million, four hundred forty-five thousand, four hundred sixty-one".