70737973 has 2 divisors, whose sum is σ = 70737974. Its totient is φ = 70737972.

The previous prime is 70737971. The next prime is 70737983. The reversal of 70737973 is 37973707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59861169 + 10876804 = 7737^2 + 3298^2 .

It is an emirp because it is prime and its reverse (37973707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70737973 - 2¹ = 70737971 is a prime.

Together with 70737971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70737971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35368986 + 35368987.

It is an arithmetic number, because the mean of its divisors is an integer number (35368987).

Almost surely, 2^70737973 is an apocalyptic number.

It is an amenable number.

70737973 is a deficient number, since it is larger than the sum of its proper divisors (1).

70737973 is an equidigital number, since it uses as much as digits as its factorization.

70737973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194481, while the sum is 43.

The square root of 70737973 is about 8410.5869593031. The cubic root of 70737973 is about 413.5717545002.

The spelling of 70737973 in words is "seventy million, seven hundred thirty-seven thousand, nine hundred seventy-three".