245755691 has 2 divisors, whose sum is σ = 245755692. Its totient is φ = 245755690.

The previous prime is 245755673. The next prime is 245755771. The reversal of 245755691 is 196557542.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245755691 - 2¹⁰ = 245754667 is a prime.

It is not a weakly prime, because it can be changed into another prime (245755661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122877845 + 122877846.

It is an arithmetic number, because the mean of its divisors is an integer number (122877846).

Almost surely, 2^245755691 is an apocalyptic number.

245755691 is a deficient number, since it is larger than the sum of its proper divisors (1).

245755691 is an equidigital number, since it uses as much as digits as its factorization.

245755691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 44.

The square root of 245755691 is about 15676.5969202503. The cubic root of 245755691 is about 626.3751617226.

The spelling of 245755691 in words is "two hundred forty-five million, seven hundred fifty-five thousand, six hundred ninety-one".