125533691 has 2 divisors, whose sum is σ = 125533692. Its totient is φ = 125533690.

The previous prime is 125533673. The next prime is 125533693. The reversal of 125533691 is 196335521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125533691 - 2²⁶ = 58424827 is a prime.

Together with 125533693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125533693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62766845 + 62766846.

It is an arithmetic number, because the mean of its divisors is an integer number (62766846).

Almost surely, 2^125533691 is an apocalyptic number.

125533691 is a deficient number, since it is larger than the sum of its proper divisors (1).

125533691 is an equidigital number, since it uses as much as digits as its factorization.

125533691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 35.

The square root of 125533691 is about 11204.1818532189. The cubic root of 125533691 is about 500.7105776803.

The spelling of 125533691 in words is "one hundred twenty-five million, five hundred thirty-three thousand, six hundred ninety-one".