70724791 has 2 divisors, whose sum is σ = 70724792. Its totient is φ = 70724790.

The previous prime is 70724761. The next prime is 70724807. The reversal of 70724791 is 19742707.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70724791 - 2¹³ = 70716599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70724791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70724711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35362395 + 35362396.

It is an arithmetic number, because the mean of its divisors is an integer number (35362396).

Almost surely, 2^70724791 is an apocalyptic number.

70724791 is a deficient number, since it is larger than the sum of its proper divisors (1).

70724791 is an equidigital number, since it uses as much as digits as its factorization.

70724791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 70724791 is about 8409.8032676157. The cubic root of 70724791 is about 413.5460632469.

The spelling of 70724791 in words is "seventy million, seven hundred twenty-four thousand, seven hundred ninety-one".