70471949 has 4 divisors (see below), whose sum is σ = 70500864. Its totient is φ = 70443036.

The previous prime is 70471903. The next prime is 70471957. The reversal of 70471949 is 94917407.

It is a happy number.

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 70471949 - 2⁸ = 70471693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70471979) 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 3 ways as a sum of consecutive naturals, for example, 10427 + ... + 15800.

It is an arithmetic number, because the mean of its divisors is an integer number (17625216).

Almost surely, 2^70471949 is an apocalyptic number.

It is an amenable number.

70471949 is a deficient number, since it is larger than the sum of its proper divisors (28915).

70471949 is a wasteful number, since it uses less digits than its factorization.

70471949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28914.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 70471949 is about 8394.7572329401. The cubic root of 70471949 is about 413.0526640509.

The spelling of 70471949 in words is "seventy million, four hundred seventy-one thousand, nine hundred forty-nine".