245072691 has 12 divisors (see below), whose sum is σ = 354963232. Its totient is φ = 162934416.

The previous prime is 245072687. The next prime is 245072699. The reversal of 245072691 is 196270542.

It is not a de Polignac number, because 245072691 - 2² = 245072687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245072699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33796 + ... + 40401.

Almost surely, 2^245072691 is an apocalyptic number.

245072691 is a deficient number, since it is larger than the sum of its proper divisors (109890541).

245072691 is a wasteful number, since it uses less digits than its factorization.

245072691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74570 (or 74567 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 245072691 is about 15654.7976991081. The cubic root of 245072691 is about 625.7943529643.

The spelling of 245072691 in words is "two hundred forty-five million, seventy-two thousand, six hundred ninety-one".