2621947 has 2 divisors, whose sum is σ = 2621948. Its totient is φ = 2621946.

The previous prime is 2621933. The next prime is 2621951. The reversal of 2621947 is 7491262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2621947 - 2⁷ = 2621819 is a prime.

It is not a weakly prime, because it can be changed into another prime (2621917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310973 + 1310974.

It is an arithmetic number, because the mean of its divisors is an integer number (1310974).

2^2621947 is an apocalyptic number.

2621947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621947 is an equidigital number, since it uses as much as digits as its factorization.

2621947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 2621947 is about 1619.2427242387. The cubic root of 2621947 is about 137.8927087361.

It can be divided in two parts, 262 and 1947, that added together give a square (2209 = 47²).

The spelling of 2621947 in words is "two million, six hundred twenty-one thousand, nine hundred forty-seven".