70312621 has 4 divisors (see below), whose sum is σ = 70432992. Its totient is φ = 70192252.

The previous prime is 70312591. The next prime is 70312631. The reversal of 70312621 is 12621307.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70312621 - 2¹⁷ = 70181549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70312592 and 70312601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70312631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59305 + ... + 60478.

It is an arithmetic number, because the mean of its divisors is an integer number (17608248).

Almost surely, 2^70312621 is an apocalyptic number.

It is an amenable number.

70312621 is a deficient number, since it is larger than the sum of its proper divisors (120371).

70312621 is a wasteful number, since it uses less digits than its factorization.

70312621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120370.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 70312621 is about 8385.2621306671. The cubic root of 70312621 is about 412.7411428721.

Adding to 70312621 its reverse (12621307), we get a palindrome (82933928).

The spelling of 70312621 in words is "seventy million, three hundred twelve thousand, six hundred twenty-one".