70561903 has 2 divisors, whose sum is σ = 70561904. Its totient is φ = 70561902.

The previous prime is 70561891. The next prime is 70561927. The reversal of 70561903 is 30916507.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70561903 - 2¹³ = 70553711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70561963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35280951 + 35280952.

It is an arithmetic number, because the mean of its divisors is an integer number (35280952).

Almost surely, 2^70561903 is an apocalyptic number.

70561903 is a deficient number, since it is larger than the sum of its proper divisors (1).

70561903 is an equidigital number, since it uses as much as digits as its factorization.

70561903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 70561903 is about 8400.1132730458. The cubic root of 70561903 is about 413.2283365083.

The spelling of 70561903 in words is "seventy million, five hundred sixty-one thousand, nine hundred three".