70377921 has 12 divisors (see below), whose sum is σ = 102591060. Its totient is φ = 46487520.

The previous prime is 70377889. The next prime is 70377947. The reversal of 70377921 is 12977307.

It can be written as a sum of positive squares in 2 ways, for example, as 46991025 + 23386896 = 6855^2 + 4836^2 .

It is not a de Polignac number, because 70377921 - 2⁵ = 70377889 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70377221) 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 in 11 ways as a sum of consecutive naturals, for example, 34890 + ... + 36851.

It is an arithmetic number, because the mean of its divisors is an integer number (8549255).

Almost surely, 2^70377921 is an apocalyptic number.

It is an amenable number.

70377921 is a deficient number, since it is larger than the sum of its proper divisors (32213139).

70377921 is a wasteful number, since it uses less digits than its factorization.

70377921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71856 (or 71853 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 70377921 is about 8389.1549634036. The cubic root of 70377921 is about 412.8688755467.

The spelling of 70377921 in words is "seventy million, three hundred seventy-seven thousand, nine hundred twenty-one".