47405397 has 16 divisors (see below), whose sum is σ = 69005888. Its totient is φ = 28771200.

The previous prime is 47405377. The next prime is 47405431. The reversal of 47405397 is 79350474.

It is not a de Polignac number, because 47405397 - 2¹⁵ = 47372629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47405327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5479 + ... + 11172.

It is an arithmetic number, because the mean of its divisors is an integer number (4312868).

Almost surely, 2^47405397 is an apocalyptic number.

It is an amenable number.

47405397 is a deficient number, since it is larger than the sum of its proper divisors (21600491).

47405397 is a wasteful number, since it uses less digits than its factorization.

47405397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16740.

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 47405397 is about 6885.1577323980. The cubic root of 47405397 is about 361.9172327895.

The spelling of 47405397 in words is "forty-seven million, four hundred five thousand, three hundred ninety-seven".