47950813 has 4 divisors (see below), whose sum is σ = 50474560. Its totient is φ = 45427068.

The previous prime is 47950787. The next prime is 47950871. The reversal of 47950813 is 31805974.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31805974 = 2 ⋅15902987.

It is a cyclic number.

It is not a de Polignac number, because 47950813 - 2⁵ = 47950781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47950313) 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, 1261845 + ... + 1261882.

It is an arithmetic number, because the mean of its divisors is an integer number (12618640).

Almost surely, 2^47950813 is an apocalyptic number.

It is an amenable number.

47950813 is a deficient number, since it is larger than the sum of its proper divisors (2523747).

47950813 is a wasteful number, since it uses less digits than its factorization.

47950813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523746.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 47950813 is about 6924.6525544608. The cubic root of 47950813 is about 363.2999390419.

The spelling of 47950813 in words is "forty-seven million, nine hundred fifty thousand, eight hundred thirteen".