70421537 has 2 divisors, whose sum is σ = 70421538. Its totient is φ = 70421536.

The previous prime is 70421513. The next prime is 70421551. The reversal of 70421537 is 73512407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61842496 + 8579041 = 7864^2 + 2929^2 .

It is a cyclic number.

It is not a de Polignac number, because 70421537 - 2⁶ = 70421473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70421237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35210768 + 35210769.

It is an arithmetic number, because the mean of its divisors is an integer number (35210769).

Almost surely, 2^70421537 is an apocalyptic number.

It is an amenable number.

70421537 is a deficient number, since it is larger than the sum of its proper divisors (1).

70421537 is an equidigital number, since it uses as much as digits as its factorization.

70421537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 70421537 is about 8391.7541074557. The cubic root of 70421537 is about 412.9541483608.

The spelling of 70421537 in words is "seventy million, four hundred twenty-one thousand, five hundred thirty-seven".