238745407 has 2 divisors, whose sum is σ = 238745408. Its totient is φ = 238745406.

The previous prime is 238745401. The next prime is 238745461. The reversal of 238745407 is 704547832.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238745407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238745407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238745401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119372703 + 119372704.

It is an arithmetic number, because the mean of its divisors is an integer number (119372704).

Almost surely, 2^238745407 is an apocalyptic number.

238745407 is a deficient number, since it is larger than the sum of its proper divisors (1).

238745407 is an equidigital number, since it uses as much as digits as its factorization.

238745407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 188160, while the sum is 40.

The square root of 238745407 is about 15451.3885136579. The cubic root of 238745407 is about 620.3617443245.

It can be divided in two parts, 238 and 745407, that multiplied together give a triangular number (177406866 = T₁₈₈₃₆).

The spelling of 238745407 in words is "two hundred thirty-eight million, seven hundred forty-five thousand, four hundred seven".