70388537 has 2 divisors, whose sum is σ = 70388538. Its totient is φ = 70388536.

The previous prime is 70388509. The next prime is 70388557. The reversal of 70388537 is 73588307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50282281 + 20106256 = 7091^2 + 4484^2 .

It is a cyclic number.

It is not a de Polignac number, because 70388537 - 2⁶ = 70388473 is a prime.

It is a super-2 number, since 2×70388537² = 9909092282000738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70388494 and 70388503.

It is not a weakly prime, because it can be changed into another prime (70388557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35194268 + 35194269.

It is an arithmetic number, because the mean of its divisors is an integer number (35194269).

Almost surely, 2^70388537 is an apocalyptic number.

It is an amenable number.

70388537 is a deficient number, since it is larger than the sum of its proper divisors (1).

70388537 is an equidigital number, since it uses as much as digits as its factorization.

70388537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 70388537 is about 8389.7876611986. The cubic root of 70388537 is about 412.8896339301.

The spelling of 70388537 in words is "seventy million, three hundred eighty-eight thousand, five hundred thirty-seven".