70537381 has 2 divisors, whose sum is σ = 70537382. Its totient is φ = 70537380.

The previous prime is 70537373. The next prime is 70537409. The reversal of 70537381 is 18373507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37933281 + 32604100 = 6159^2 + 5710^2 .

It is a cyclic number.

It is not a de Polignac number, because 70537381 - 2³ = 70537373 is a prime.

It is a super-2 number, since 2×70537381² = 9951044236678322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70537331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35268690 + 35268691.

It is an arithmetic number, because the mean of its divisors is an integer number (35268691).

Almost surely, 2^70537381 is an apocalyptic number.

It is an amenable number.

70537381 is a deficient number, since it is larger than the sum of its proper divisors (1).

70537381 is an equidigital number, since it uses as much as digits as its factorization.

70537381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 70537381 is about 8398.6535230357. The cubic root of 70537381 is about 413.1804619523.

The spelling of 70537381 in words is "seventy million, five hundred thirty-seven thousand, three hundred eighty-one".