407978149 has 2 divisors, whose sum is σ = 407978150. Its totient is φ = 407978148.

The previous prime is 407978099. The next prime is 407978183. The reversal of 407978149 is 941879704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407757249 + 220900 = 20193^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 407978149 - 2¹⁵ = 407945381 is a prime.

It is a super-2 number, since 2×407978149² = 332892340122932402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (407978749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203989074 + 203989075.

It is an arithmetic number, because the mean of its divisors is an integer number (203989075).

Almost surely, 2^407978149 is an apocalyptic number.

It is an amenable number.

407978149 is a deficient number, since it is larger than the sum of its proper divisors (1).

407978149 is an equidigital number, since it uses as much as digits as its factorization.

407978149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 407978149 is about 20198.4689766329. The cubic root of 407978149 is about 741.6727129471.

It can be divided in two parts, 4079 and 78149, that added together give a palindrome (82228).

The spelling of 407978149 in words is "four hundred seven million, nine hundred seventy-eight thousand, one hundred forty-nine".