70539421 has 2 divisors, whose sum is σ = 70539422. Its totient is φ = 70539420.

The previous prime is 70539407. The next prime is 70539451. The reversal of 70539421 is 12493507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67076100 + 3463321 = 8190^2 + 1861^2 .

It is a cyclic number.

It is not a de Polignac number, because 70539421 - 2¹¹ = 70537373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70539401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35269710 + 35269711.

It is an arithmetic number, because the mean of its divisors is an integer number (35269711).

Almost surely, 2^70539421 is an apocalyptic number.

It is an amenable number.

70539421 is a deficient number, since it is larger than the sum of its proper divisors (1).

70539421 is an equidigital number, since it uses as much as digits as its factorization.

70539421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 70539421 is about 8398.7749701965. The cubic root of 70539421 is about 413.1844450886.

The spelling of 70539421 in words is "seventy million, five hundred thirty-nine thousand, four hundred twenty-one".