70237861 has 2 divisors, whose sum is σ = 70237862. Its totient is φ = 70237860.

The previous prime is 70237859. The next prime is 70237919. The reversal of 70237861 is 16873207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44289025 + 25948836 = 6655^2 + 5094^2 .

It is a cyclic number.

It is not a de Polignac number, because 70237861 - 2¹ = 70237859 is a prime.

Together with 70237859, 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 (70237061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35118930 + 35118931.

It is an arithmetic number, because the mean of its divisors is an integer number (35118931).

Almost surely, 2^70237861 is an apocalyptic number.

It is an amenable number.

70237861 is a deficient number, since it is larger than the sum of its proper divisors (1).

70237861 is an equidigital number, since it uses as much as digits as its factorization.

70237861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 70237861 is about 8380.8031238062. The cubic root of 70237861 is about 412.5948084495.

It can be divided in two parts, 7023 and 7861, that added together give a square (14884 = 122²).

The spelling of 70237861 in words is "seventy million, two hundred thirty-seven thousand, eight hundred sixty-one".