191672051 has 2 divisors, whose sum is σ = 191672052. Its totient is φ = 191672050.

The previous prime is 191672023. The next prime is 191672053. The reversal of 191672051 is 150276191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191672051 - 2²² = 187477747 is a prime.

Together with 191672053, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 191671999 and 191672017.

It is not a weakly prime, because it can be changed into another prime (191672053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95836025 + 95836026.

It is an arithmetic number, because the mean of its divisors is an integer number (95836026).

Almost surely, 2^191672051 is an apocalyptic number.

191672051 is a deficient number, since it is larger than the sum of its proper divisors (1).

191672051 is an equidigital number, since it uses as much as digits as its factorization.

191672051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 191672051 is about 13844.5675627663. The cubic root of 191672051 is about 576.5711796115.

The spelling of 191672051 in words is "one hundred ninety-one million, six hundred seventy-two thousand, fifty-one".